What is the chemical backbone of life on Earth?
⚫️Carbon is the chemical backbone of life on Earth, required to form complex molecules like proteins and DNA.
⚪️This element is also found in our atmosphere in the form of carbon dioxide (CO2).
🟢Carbon compounds regulate the Earth’s temperature, make up the food for living organisms, and provide energy that fuels human’s economy.
🪨🌊💨Most of Earth’s carbon is stored in rocks and sediments. The rest is located in the ocean, atmosphere, and in living organisms. These are the reservoirs through which carbon cycles.
🌀The carbon cycle is nature's way of recycling carbon atoms.
⚫️Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms.
🌊💨In the case of the ocean, carbon is continually exchanged between the ocean’s surface waters and the atmosphere, or is stored for long periods of time in the ocean depths.
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⚫️Carbon is the chemical backbone of life on Earth, required to form complex molecules like proteins and DNA.
⚪️This element is also found in our atmosphere in the form of carbon dioxide (CO2).
🟢Carbon compounds regulate the Earth’s temperature, make up the food for living organisms, and provide energy that fuels human’s economy.
🪨🌊💨Most of Earth’s carbon is stored in rocks and sediments. The rest is located in the ocean, atmosphere, and in living organisms. These are the reservoirs through which carbon cycles.
🌀The carbon cycle is nature's way of recycling carbon atoms.
⚫️Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms.
🌊💨In the case of the ocean, carbon is continually exchanged between the ocean’s surface waters and the atmosphere, or is stored for long periods of time in the ocean depths.
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What is the greenhouse effect and why is it important?
✅ The greenhouse effect is the way in which heat is trapped close to Earth's surface by “greenhouse gases.” These heat-trapping gases can be thought of as a blanket wrapped around Earth, keeping the planet toastier than it would be without them.
✅ Scientists have determined that carbon dioxide's warming effect helps stabilize Earth's atmosphere. Remove carbon dioxide, and the terrestrial greenhouse effect would collapse. Without carbon dioxide, Earth's surface would be some 33°C (59°F) cooler.
✅ Greenhouse gases occur naturally and are part of our atmosphere's makeup. For that reason, Earth is sometimes called the “Goldilocks” planet – its conditions are not too hot and not too cold, but just right to allow life (including humans) to flourish. Part of what makes Earth so amenable is its natural greenhouse effect, which keeps the planet at a friendly 15 °C (59 °F) on average.
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✅ The greenhouse effect is the way in which heat is trapped close to Earth's surface by “greenhouse gases.” These heat-trapping gases can be thought of as a blanket wrapped around Earth, keeping the planet toastier than it would be without them.
✅ Scientists have determined that carbon dioxide's warming effect helps stabilize Earth's atmosphere. Remove carbon dioxide, and the terrestrial greenhouse effect would collapse. Without carbon dioxide, Earth's surface would be some 33°C (59°F) cooler.
✅ Greenhouse gases occur naturally and are part of our atmosphere's makeup. For that reason, Earth is sometimes called the “Goldilocks” planet – its conditions are not too hot and not too cold, but just right to allow life (including humans) to flourish. Part of what makes Earth so amenable is its natural greenhouse effect, which keeps the planet at a friendly 15 °C (59 °F) on average.
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What is the difference between global warming and climate change?
🌏🌡📈Global warming is the long-term warming of the planet’s overall temperature. Though this warming trend has been going on for a long time, its pace has significantly increased in the last hundred years due to human activities. As the human population has increased, so has the volume of fossil fuels burned. Fossil fuels include coal, oil, and natural gas, and burning them accelerates what is known as the “greenhouse effect” in Earth’s atmosphere. Scientists continue to study global warming and its impact on Earth.
🌦🌪🌊Global warming has presented another issue called climate change. Sometimes these terms are used interchangeably, however, they are different. Climate change refers to changes in weather patterns and growing seasons around the world. It also refers to sea level rise caused by the expansion of warmer seas and melting ice sheets and glaciers.
Global warming causes climate change.
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🌏🌡📈Global warming is the long-term warming of the planet’s overall temperature. Though this warming trend has been going on for a long time, its pace has significantly increased in the last hundred years due to human activities. As the human population has increased, so has the volume of fossil fuels burned. Fossil fuels include coal, oil, and natural gas, and burning them accelerates what is known as the “greenhouse effect” in Earth’s atmosphere. Scientists continue to study global warming and its impact on Earth.
🌦🌪🌊Global warming has presented another issue called climate change. Sometimes these terms are used interchangeably, however, they are different. Climate change refers to changes in weather patterns and growing seasons around the world. It also refers to sea level rise caused by the expansion of warmer seas and melting ice sheets and glaciers.
Global warming causes climate change.
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What are possible future effects of global warming and climate change?
❗️According to researchers, since 1906, the global average surface temperature has increased by more than 0.9 °C (1.6 °F) - even more in sensitive polar regions.
Effects that could take place later, if warming continues, include:
🌊🆙Sea levels could rise between 26 and 82 cm (10 and 32 inches) or higher by 2100.
🌪🌀🌨☀️Storms, floods and droughts could become stronger and more common.
💧🆘Less freshwater could be available, since glaciers store about three-quarters of the world's freshwater.
🦠Some diseases could spread, such as mosquito-borne malaria.
🌏Ecosystems could continue to change: some species could move farther north or become more successful; others could not be able to adapt and become extinct.
☹️More health, social and economic risks for humans.
ℹ️Scientists claim that atmospheric levels of CO2 are now similar to where they were during the mid-Pliocene epoch, about 3-4 million years ago.
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❗️According to researchers, since 1906, the global average surface temperature has increased by more than 0.9 °C (1.6 °F) - even more in sensitive polar regions.
Effects that could take place later, if warming continues, include:
🌊🆙Sea levels could rise between 26 and 82 cm (10 and 32 inches) or higher by 2100.
🌪🌀🌨☀️Storms, floods and droughts could become stronger and more common.
💧🆘Less freshwater could be available, since glaciers store about three-quarters of the world's freshwater.
🦠Some diseases could spread, such as mosquito-borne malaria.
🌏Ecosystems could continue to change: some species could move farther north or become more successful; others could not be able to adapt and become extinct.
☹️More health, social and economic risks for humans.
ℹ️Scientists claim that atmospheric levels of CO2 are now similar to where they were during the mid-Pliocene epoch, about 3-4 million years ago.
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How humans contribute to climate change?
🇺🇳According to the UN, today burning of fossil fuels by humans is the largest contributor to global climate change, accounting for over 75 per cent of global greenhouse gas emissions and nearly 90 per cent of all carbon dioxide emissions.
CO2 is the primary greenhouse gas emitted through human activities.
Human activities are altering the carbon cycle–both by adding more CO2 to the atmosphere and by influencing the ability of natural sinks (forests, soils...) to remove and store CO2 from the atmosphere.
While CO2 emissions come from a variety of natural sources, human-related emissions are responsible for the increase that has occurred in the atmosphere since the industrial revolution that began around 1750.
💡🏭✈️🚇🚘The main human activity that emits CO2 is the combustion of fossil fuels for energy, transportation and industry.
ℹ️According to researchers, CO2 levels are now higher than at anytime in the past 3.6 million years.
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🇺🇳According to the UN, today burning of fossil fuels by humans is the largest contributor to global climate change, accounting for over 75 per cent of global greenhouse gas emissions and nearly 90 per cent of all carbon dioxide emissions.
CO2 is the primary greenhouse gas emitted through human activities.
Human activities are altering the carbon cycle–both by adding more CO2 to the atmosphere and by influencing the ability of natural sinks (forests, soils...) to remove and store CO2 from the atmosphere.
While CO2 emissions come from a variety of natural sources, human-related emissions are responsible for the increase that has occurred in the atmosphere since the industrial revolution that began around 1750.
💡🏭✈️🚇🚘The main human activity that emits CO2 is the combustion of fossil fuels for energy, transportation and industry.
ℹ️According to researchers, CO2 levels are now higher than at anytime in the past 3.6 million years.
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How global human-related CO2 emissions are calculated?
📊Global human-related CO2 emissions are calculated in GtCO2 (one billion tonnes of CO2) per year.
➕✖️🟰Countries report their emissions through what is known as a ‘bottom up’ approach, where national emissions are estimated by combining data on types of activity with the emissions typically produced by those activities. So, if you know how much CO2 steelmaking produces, and you know how much steel is produced in a country, you can estimate the total quantity of emissions from the steel sector. There are internationally agreed guidelines that specify how this kind of accountancy should be done.
ℹ️According to researchers, in 2022, global CO2 emissions from fossil fuel combustion and cement production reached 36.1 ± 0.7 GtCO2. In the sectoral breakdown of 2022 CO2 emissions power accounted for 39.3%, industry 28.9%, ground transportation 17.9%, residential 9.9%, international bunkers 3.1%, and domestic aviation 0.9%.
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📊Global human-related CO2 emissions are calculated in GtCO2 (one billion tonnes of CO2) per year.
➕✖️🟰Countries report their emissions through what is known as a ‘bottom up’ approach, where national emissions are estimated by combining data on types of activity with the emissions typically produced by those activities. So, if you know how much CO2 steelmaking produces, and you know how much steel is produced in a country, you can estimate the total quantity of emissions from the steel sector. There are internationally agreed guidelines that specify how this kind of accountancy should be done.
ℹ️According to researchers, in 2022, global CO2 emissions from fossil fuel combustion and cement production reached 36.1 ± 0.7 GtCO2. In the sectoral breakdown of 2022 CO2 emissions power accounted for 39.3%, industry 28.9%, ground transportation 17.9%, residential 9.9%, international bunkers 3.1%, and domestic aviation 0.9%.
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What is the link between climate crisis and meat/dairy products?
The link between climate crisis and meat/dairy products may not be obvious, but for many experts it’s clear.
🥩🥛↔️🌏🌦
Studies affirm that between 11.1 and 19.6% of global human-made greenhouse gas (GHG) emissions come from meat and dairy production/animal agriculture, which is a leading cause of deforestation, responsible for significant biodiversity loss and pollution, and emits large amounts of methane, which alone is the cause of over 25% of global warming.
📌Some experts even claim that animal agriculture is the largest contributor to global climate change.
📌However, according researchers, the extent to which it contributes to global emissions depends on how studies define different economic sectors, and whether they incorporate farming equipment and food exports in the assessment of animal impact.
ℹ️Most sources list animal agriculture as the No. 2 contributor to GHG emissions after fossil fuels.
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The link between climate crisis and meat/dairy products may not be obvious, but for many experts it’s clear.
🥩🥛↔️🌏🌦
Studies affirm that between 11.1 and 19.6% of global human-made greenhouse gas (GHG) emissions come from meat and dairy production/animal agriculture, which is a leading cause of deforestation, responsible for significant biodiversity loss and pollution, and emits large amounts of methane, which alone is the cause of over 25% of global warming.
📌Some experts even claim that animal agriculture is the largest contributor to global climate change.
📌However, according researchers, the extent to which it contributes to global emissions depends on how studies define different economic sectors, and whether they incorporate farming equipment and food exports in the assessment of animal impact.
ℹ️Most sources list animal agriculture as the No. 2 contributor to GHG emissions after fossil fuels.
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Which countries and regions emit the most CO2?
🇺🇸 The USA is the biggest emitter in history, having released more than 420 GtCO2 into the atmosphere - a quarter of all historical human-related CO2.
In 2022, 3 countries account for the lion’s share of global CO2 emissions.
🇨🇳China is highest, at 32%-11.5 GtCO2.
🇺🇸The USA is next with 14%-5 GtCO2.
🇮🇳India's emissions make up 8%-2.8 GtCO2.
🇪🇺The European Union accounts for 8%-2.8 GtCO2.
🇷🇺🇯🇵🇮🇷🇸🇦🇮🇩🇨🇦
The top 10 countries with highest CO2 emissions include Russia, Japan, Iran, Saudi Arabia, Indonesia and Canada.
In 2022
✔️with 17.7 GtCO2, the Asia-Pacific region is the largest emitter. However, as it is home to more than 60% of the world’s population per capita emissions are there slightly lower than the world average.
✔️the 2nd most polluting region is North America - 5.9 GtCO2.
✔️Africa and South America are both fairly small emitters: accounting for 3-4% (1.4 GtCO2) of global emissions each.
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🇺🇸 The USA is the biggest emitter in history, having released more than 420 GtCO2 into the atmosphere - a quarter of all historical human-related CO2.
In 2022, 3 countries account for the lion’s share of global CO2 emissions.
🇨🇳China is highest, at 32%-11.5 GtCO2.
🇺🇸The USA is next with 14%-5 GtCO2.
🇮🇳India's emissions make up 8%-2.8 GtCO2.
🇪🇺The European Union accounts for 8%-2.8 GtCO2.
🇷🇺🇯🇵🇮🇷🇸🇦🇮🇩🇨🇦
The top 10 countries with highest CO2 emissions include Russia, Japan, Iran, Saudi Arabia, Indonesia and Canada.
In 2022
✔️with 17.7 GtCO2, the Asia-Pacific region is the largest emitter. However, as it is home to more than 60% of the world’s population per capita emissions are there slightly lower than the world average.
✔️the 2nd most polluting region is North America - 5.9 GtCO2.
✔️Africa and South America are both fairly small emitters: accounting for 3-4% (1.4 GtCO2) of global emissions each.
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How do CO2 emissions in North and South America look like from space?
Advanced computer modeling techniques allow to make visualizations showing the CO2 being added to Earth's atmosphere over the course of the year 2021, split into four major contributors: fossil fuels in orange, burning biomass in red, land ecosystems in green, and the ocean in blue. The dots on the surface also show how atmospheric CO2 is also being absorbed by land ecosystems in green and the ocean in blue.
🌎In this view ⬆️ highlighting North and South America, during the growing season plants absorb CO2 through photosynthesis, but release much of this carbon through respiration during winter months. One can see fossil fuel emissions from the northeastern urban corridor in the United States. The fast oscillation over the Amazon rainforest shows the impact of plants absorbing carbon while the sun is shining and then releasing it during nighttime hours.
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Advanced computer modeling techniques allow to make visualizations showing the CO2 being added to Earth's atmosphere over the course of the year 2021, split into four major contributors: fossil fuels in orange, burning biomass in red, land ecosystems in green, and the ocean in blue. The dots on the surface also show how atmospheric CO2 is also being absorbed by land ecosystems in green and the ocean in blue.
🌎In this view ⬆️ highlighting North and South America, during the growing season plants absorb CO2 through photosynthesis, but release much of this carbon through respiration during winter months. One can see fossil fuel emissions from the northeastern urban corridor in the United States. The fast oscillation over the Amazon rainforest shows the impact of plants absorbing carbon while the sun is shining and then releasing it during nighttime hours.
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How do CO2 emissions in Africa, Asia, Australia and Europe look like from space?
🌏The left view ⬆️ highlights CO2 sources and sinks over Asia and Australia. The notable feature is fossil fuel emissions from China. In contrast, drawdown from the land biosphere is visible over Australia for much of the year because emissions and population density are much lower. By the end of the animation, fossil fuel emissions which are released predominantly in the Northern Hemisphere are mixing southward obscuring Australia.
🌍The right view ⬆️ highlights Europe, the Middle East, and Africa. European fossil fuel emissions are visible as is red representing emissions from fires over central Africa that are used to clear crop residue.
ℹ️ Fires represent a much smaller source of CO2 to the atmosphere than fossil fuel emissions, but are monitored by scientists as they can alter the ability of an ecosystem to sequester carbon and in the future become more severe because of climate change.
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🌏The left view ⬆️ highlights CO2 sources and sinks over Asia and Australia. The notable feature is fossil fuel emissions from China. In contrast, drawdown from the land biosphere is visible over Australia for much of the year because emissions and population density are much lower. By the end of the animation, fossil fuel emissions which are released predominantly in the Northern Hemisphere are mixing southward obscuring Australia.
🌍The right view ⬆️ highlights Europe, the Middle East, and Africa. European fossil fuel emissions are visible as is red representing emissions from fires over central Africa that are used to clear crop residue.
ℹ️ Fires represent a much smaller source of CO2 to the atmosphere than fossil fuel emissions, but are monitored by scientists as they can alter the ability of an ecosystem to sequester carbon and in the future become more severe because of climate change.
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What is the “command centre” of most animals?
📌The nervous system (NS) is the “command centre” of an animal's body that coordinates its behavior and transmits signals between different body areas.
📌The function of the NS is to control movement of the organism and to affect the environment (e.g. through pheromones) by sending signals from one cell to others, or from one part of the body to others.
📌At the cellular level, the NS is defined by the presence of neurons, also known as "nerve cells".
📌Nervous systems are found in almost all multicellular animals, but vary greatly in complexity.
📌The NS derives its name from nerves, which are cylindrical bundles of fibers that emanate from the brain and central cord, and branch repeatedly to innervate every part of the body. Nerves are large enough to have been recognized by the ancient Egyptians, Greeks, and Romans, but their internal structure was not understood until it became possible to examine them using a microscope.
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📌The nervous system (NS) is the “command centre” of an animal's body that coordinates its behavior and transmits signals between different body areas.
📌The function of the NS is to control movement of the organism and to affect the environment (e.g. through pheromones) by sending signals from one cell to others, or from one part of the body to others.
📌At the cellular level, the NS is defined by the presence of neurons, also known as "nerve cells".
📌Nervous systems are found in almost all multicellular animals, but vary greatly in complexity.
📌The NS derives its name from nerves, which are cylindrical bundles of fibers that emanate from the brain and central cord, and branch repeatedly to innervate every part of the body. Nerves are large enough to have been recognized by the ancient Egyptians, Greeks, and Romans, but their internal structure was not understood until it became possible to examine them using a microscope.
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What do we know about neurons?
✔️One of the two main types of cells in the nervous system are neurons.
🔬✍️They can be distinguished from other cells in a number of ways, but their most fundamental property is that they communicate with other cells via synapses, which are junctions containing molecular machinery allowing rapid transmission of electrical or chemical signals.
🔬✍️Many types of neuron possess an axon, a protoplasmic protrusion that can extend to distant parts of the body and make thousands of synaptic contacts.
✍️Even in the nervous system of a single species, hundreds of different types of neurons exist, with various morphologies and functions. For example, sensory neurons transmute physical stimuli such as light and sound into neural signals, and motor neurons transmute neural signals into activation of muscles or glands. In many species, though, the majority of neurons receive all of their input from other neurons and send their output to other neurons.
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✔️One of the two main types of cells in the nervous system are neurons.
🔬✍️They can be distinguished from other cells in a number of ways, but their most fundamental property is that they communicate with other cells via synapses, which are junctions containing molecular machinery allowing rapid transmission of electrical or chemical signals.
🔬✍️Many types of neuron possess an axon, a protoplasmic protrusion that can extend to distant parts of the body and make thousands of synaptic contacts.
✍️Even in the nervous system of a single species, hundreds of different types of neurons exist, with various morphologies and functions. For example, sensory neurons transmute physical stimuli such as light and sound into neural signals, and motor neurons transmute neural signals into activation of muscles or glands. In many species, though, the majority of neurons receive all of their input from other neurons and send their output to other neurons.
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What are glial cells?
✔️The second main type in the nervous system are glial cells.
Glial cells (named from the Greek word for "glue") are non-neuronal cells that provide support and nutrition, maintain homeostasis, form myelin, and participate in signal transmission in the nervous system.
Among the most important functions of glial cells are:
📍to support neurons and hold them in place
📍to supply nutrients to neurons
📍to insulate neurons electrically
📍to destroy pathogens and remove dead neurons
📍to provide guidance cues directing the axons of neurons to their targets.
✍️A very important set of glial cell generate layers of a fatty substance called myelin that wrap around axons and provide electrical insulation that allows them to transmit signals much more rapidly and efficiently.
✍️🧠In the human brain, it is currently estimated that the total number of glia roughly equals the number of neurons, although the proportions vary in different brain areas.
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✔️The second main type in the nervous system are glial cells.
Glial cells (named from the Greek word for "glue") are non-neuronal cells that provide support and nutrition, maintain homeostasis, form myelin, and participate in signal transmission in the nervous system.
Among the most important functions of glial cells are:
📍to support neurons and hold them in place
📍to supply nutrients to neurons
📍to insulate neurons electrically
📍to destroy pathogens and remove dead neurons
📍to provide guidance cues directing the axons of neurons to their targets.
✍️A very important set of glial cell generate layers of a fatty substance called myelin that wrap around axons and provide electrical insulation that allows them to transmit signals much more rapidly and efficiently.
✍️🧠In the human brain, it is currently estimated that the total number of glia roughly equals the number of neurons, although the proportions vary in different brain areas.
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What are the components of the nervous system?
✍️The nervous system of vertebrates has two components: the central nervous system (CNS) and the peripheral nervous system (PNS).
☑️The CNS is the largest part, and includes the brain and the spinal cord.
☑️Structures that do not lie within the CNS, are called the PNS.
The majority of nerves belong to the PNS, even when the cell bodies of the neurons to which they belong reside within the brain or spinal cord.
The PNS is divided into:
🔘the somatic part consisting of the nerves that innervate the skin, joints, and muscles.
🔘the visceral part, or the autonomic nervous system, that contains neurons that innervate the internal organs, blood vessels, and glands, and itself has two parts:
▪️the sympathetic nervous system
and
▪️the parasympathetic nervous system.
ℹ️Some authors also include sensory neurons whose cell bodies lie in the periphery (for senses such as hearing) as part of the PNS; others, however, omit them.
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✍️The nervous system of vertebrates has two components: the central nervous system (CNS) and the peripheral nervous system (PNS).
☑️The CNS is the largest part, and includes the brain and the spinal cord.
☑️Structures that do not lie within the CNS, are called the PNS.
The majority of nerves belong to the PNS, even when the cell bodies of the neurons to which they belong reside within the brain or spinal cord.
The PNS is divided into:
🔘the somatic part consisting of the nerves that innervate the skin, joints, and muscles.
🔘the visceral part, or the autonomic nervous system, that contains neurons that innervate the internal organs, blood vessels, and glands, and itself has two parts:
▪️the sympathetic nervous system
and
▪️the parasympathetic nervous system.
ℹ️Some authors also include sensory neurons whose cell bodies lie in the periphery (for senses such as hearing) as part of the PNS; others, however, omit them.
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What are some amazing facts about the animals’ nervous system?
ℹ️Sponges are the only multicellular animals without a nervous system.
🪱🐘The size of the nervous system ranges from a few hundred cells in the simplest worms, to around 300 billion cells in elephants ⬆️.
🔰 The minuscule C. elegans nematode worm has just 302 neurons, but it’s able to carry out the same functions as the nervous systems of higher organisms.
🔰 The tiny Megaphragma mymaripenne wasp ⬆️ only lives for 5️⃣ days and has just 7️⃣4️⃣0️⃣0️⃣ neurons. As it changes from a larva into an adult, it destroys the majority or its neural nuclei until just a few hundred are left, because there’s not enough room in its head.
🔰 At a larval stage, sea squirts have the same anatomical characteristics as most vertebrates, but as they grow, they lose their minds – literally. They digest their own cerebral ganglia, which controls movement, because once they’re sedentary, they no longer need it.
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ℹ️Sponges are the only multicellular animals without a nervous system.
🪱🐘The size of the nervous system ranges from a few hundred cells in the simplest worms, to around 300 billion cells in elephants ⬆️.
🔰 The minuscule C. elegans nematode worm has just 302 neurons, but it’s able to carry out the same functions as the nervous systems of higher organisms.
🔰 The tiny Megaphragma mymaripenne wasp ⬆️ only lives for 5️⃣ days and has just 7️⃣4️⃣0️⃣0️⃣ neurons. As it changes from a larva into an adult, it destroys the majority or its neural nuclei until just a few hundred are left, because there’s not enough room in its head.
🔰 At a larval stage, sea squirts have the same anatomical characteristics as most vertebrates, but as they grow, they lose their minds – literally. They digest their own cerebral ganglia, which controls movement, because once they’re sedentary, they no longer need it.
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What are some interesting features of the human nervous system?
🔴 The human nervous system can transmit signals at speeds of 100 meters per second.
🔴 The slowest signal transmission occurs inside the skin.
🔴 Every square cm of human skin contains around 200 pain receptors but only 15 receptors for pressure, 6 for cold and 1 for warmth.
🔴 In the human PNS, nerve cells can be threadlike—their width is microscopic, but their length can be measured in meters.
🔴 There are over millions of nerve cells in human CNS, 100 billion neurons in the human brain and around 13,500,000 neurons in the spinal cord.
🔴 Sciatic nerve is the longest and broadest single nerve in the human body.
🔴An optic (cranial) nerve is the fundamental part of the CNS, and the human eye's most significant sensory nerve.
🔴 B vitamins must be replenished daily as they are only stored in the body in a very small amount.
⬆️ Look at the human nervous system depicted using advanced computer modeling.
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🔴 The human nervous system can transmit signals at speeds of 100 meters per second.
🔴 The slowest signal transmission occurs inside the skin.
🔴 Every square cm of human skin contains around 200 pain receptors but only 15 receptors for pressure, 6 for cold and 1 for warmth.
🔴 In the human PNS, nerve cells can be threadlike—their width is microscopic, but their length can be measured in meters.
🔴 There are over millions of nerve cells in human CNS, 100 billion neurons in the human brain and around 13,500,000 neurons in the spinal cord.
🔴 Sciatic nerve is the longest and broadest single nerve in the human body.
🔴An optic (cranial) nerve is the fundamental part of the CNS, and the human eye's most significant sensory nerve.
🔴 B vitamins must be replenished daily as they are only stored in the body in a very small amount.
⬆️ Look at the human nervous system depicted using advanced computer modeling.
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What science studies the nervous system?
Neuroscience, also known as Neural Science, is the study of how the nervous system develops, its structure, and what it does.
Neuroscientists focus on the brain and its impact on behavior and cognitive functions and study what happens to the nervous system when people have neurological, psychiatric and neurodevelopmental disorders.
Neuroscience is also often referred to in the plural, as neurosciences.
Neuroscience has traditionally been classed as a subdivision of biology, but today it’s an interdisciplinary science, which liaises closely with other disciplines, such as mathematics, linguistics, engineering, computer science, chemistry, philosophy, psychology, and medicine.
Some researchers say that neuroscience means the same as neurobiology. However, neurobiology looks at the biology of the nervous system, while neuroscience refers to anything to do with the nervous system.
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Neuroscience, also known as Neural Science, is the study of how the nervous system develops, its structure, and what it does.
Neuroscientists focus on the brain and its impact on behavior and cognitive functions and study what happens to the nervous system when people have neurological, psychiatric and neurodevelopmental disorders.
Neuroscience is also often referred to in the plural, as neurosciences.
Neuroscience has traditionally been classed as a subdivision of biology, but today it’s an interdisciplinary science, which liaises closely with other disciplines, such as mathematics, linguistics, engineering, computer science, chemistry, philosophy, psychology, and medicine.
Some researchers say that neuroscience means the same as neurobiology. However, neurobiology looks at the biology of the nervous system, while neuroscience refers to anything to do with the nervous system.
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What science studies the nervous system? Neuroscience, also known as Neural Science, is the study of how the nervous system develops, its structure, and what it does. Neuroscientists focus on the brain and its impact on behavior and cognitive functions and…
What are the major branches of modern neuroscience?
According to researchers, the following branches of neuroscience, based on research areas and subjects of study can be broadly categorized in the following disciplines (neuroscientists usually cover several branches at the same time):
✔️ Affective neuroscience – in most cases, research is carried out on laboratory animals and looks at how neurons behave in relation to emotions.
✔️ Behavioral neuroscience – the study of the biological bases of behavior. Looking at how the brain affects behavior.
✔️ Cellular neuroscience – the study of neurons, including their form and physiological properties at cellular level.
✔️ Clinical neuroscience – looks at the disorders of the nervous system, while psychiatry, for example, looks at the disorders of the mind.
✔️ Cognitive neuroscience – the study of higher cognitive functions that exist in humans, and their underlying neural bases. Cognitive neuroscience draws from linguistics, neuroscience, psychology and cognitive science. Cognitive neuroscientists can take two broad directions; behavioral/experimental or computational/modeling, the aim being to understand the nature of cognition from a neural point of view.
✔️ Computational neuroscience – attempting to understand how brains compute, using computers to simulate and model brain functions, and applying techniques from mathematics, physics and other computational fields to study brain function.
✔️ Cultural neuroscience – looks at how beliefs, practices and cultural values are shaped by and shape the brain, minds and genes over different periods.
✔️ Developmental neuroscience – looks at how the nervous system develops on a cellular basis; what underlying mechanisms exist in neural development.
✔️ Molecular neuroscience – the study of the role of individual molecules in the nervous system.
✔️ Neuroengineering – using engineering techniques to better understand, replace, repair, or improve neural systems.
✔️ Neuroimaging – a branch of medical imaging that concentrates on the brain. Neuroimaging is used to diagnose disease and assess the health of the brain. It can also be useful in the study of the brain, how it works, and how different activities affect the brain.
✔️ Neuroinformatics – integrates data across all areas of neuroscience, to help understand the brain and treat diseases. Neuroinformatics involves acquiring data, sharing, publishing and storing information, analysis, modeling, and simulation.
✔️ Neurolinguistics – studying what neural mechanisms in the brain control the acquisition, comprehension and utterance of language.
✔️ Neurophysiology– looks at the relationship of the brain and its functions, and the sum of the body’s parts and how they interrelate. The study of how the nervous system functions, typically using physiological techniques, such as stimulation with electrodes, light-sensitive channels, or ion- or voltage-sensitive dyes.
✔️ Paleoneurology – the study of the brain using fossils.
✔️ Social neuroscience – this is an interdisciplinary field dedicated to understanding how biological systems implement social processes and behavior. Social neuroscience gathers biological concepts and methods to inform and refine theories of social behavior. It uses social and behavioral concepts and data to refine neural organization and function theories.
✔️ Systems neuroscience – follows the pathways of data flow within the CNS and tries to define the kinds of processing going on there. It uses that information to explain behavioral functions.
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According to researchers, the following branches of neuroscience, based on research areas and subjects of study can be broadly categorized in the following disciplines (neuroscientists usually cover several branches at the same time):
✔️ Affective neuroscience – in most cases, research is carried out on laboratory animals and looks at how neurons behave in relation to emotions.
✔️ Behavioral neuroscience – the study of the biological bases of behavior. Looking at how the brain affects behavior.
✔️ Cellular neuroscience – the study of neurons, including their form and physiological properties at cellular level.
✔️ Clinical neuroscience – looks at the disorders of the nervous system, while psychiatry, for example, looks at the disorders of the mind.
✔️ Cognitive neuroscience – the study of higher cognitive functions that exist in humans, and their underlying neural bases. Cognitive neuroscience draws from linguistics, neuroscience, psychology and cognitive science. Cognitive neuroscientists can take two broad directions; behavioral/experimental or computational/modeling, the aim being to understand the nature of cognition from a neural point of view.
✔️ Computational neuroscience – attempting to understand how brains compute, using computers to simulate and model brain functions, and applying techniques from mathematics, physics and other computational fields to study brain function.
✔️ Cultural neuroscience – looks at how beliefs, practices and cultural values are shaped by and shape the brain, minds and genes over different periods.
✔️ Developmental neuroscience – looks at how the nervous system develops on a cellular basis; what underlying mechanisms exist in neural development.
✔️ Molecular neuroscience – the study of the role of individual molecules in the nervous system.
✔️ Neuroengineering – using engineering techniques to better understand, replace, repair, or improve neural systems.
✔️ Neuroimaging – a branch of medical imaging that concentrates on the brain. Neuroimaging is used to diagnose disease and assess the health of the brain. It can also be useful in the study of the brain, how it works, and how different activities affect the brain.
✔️ Neuroinformatics – integrates data across all areas of neuroscience, to help understand the brain and treat diseases. Neuroinformatics involves acquiring data, sharing, publishing and storing information, analysis, modeling, and simulation.
✔️ Neurolinguistics – studying what neural mechanisms in the brain control the acquisition, comprehension and utterance of language.
✔️ Neurophysiology– looks at the relationship of the brain and its functions, and the sum of the body’s parts and how they interrelate. The study of how the nervous system functions, typically using physiological techniques, such as stimulation with electrodes, light-sensitive channels, or ion- or voltage-sensitive dyes.
✔️ Paleoneurology – the study of the brain using fossils.
✔️ Social neuroscience – this is an interdisciplinary field dedicated to understanding how biological systems implement social processes and behavior. Social neuroscience gathers biological concepts and methods to inform and refine theories of social behavior. It uses social and behavioral concepts and data to refine neural organization and function theories.
✔️ Systems neuroscience – follows the pathways of data flow within the CNS and tries to define the kinds of processing going on there. It uses that information to explain behavioral functions.
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