💈Tissues💈
Tissues are categorized as −
Plant Tissue
Animal Tissue
♦️Plant Tissue
Following are the major types of plant tissue −
➖Meristematic Tissues
➖Permanent Tissues
▪️Simple Permanent Tissues
➖Parenchyma
➖Collenchyma
➖Sclerenchyma
➖Epidermis
▪️Complex Permanent Tissue
➖Xylem
➖Phloem
▪️Meristematic Tissue
➖Meristematic tissue mainly consists of actively dividing cells, and helps in increasing the length and thickening the stems of the plant.
➖Meristematic tissue, commonly, present in the primary growth regions of a plant, for example, in the tips of stems or roots.
➖Depending on the region (where the meristematic tissues are found); meristematic tissues are classified as apical, lateral, and intercalary (see the image given below).
➖Apical meristem (as shown in the above image) is present at the growing tips of stems and roots and helps in their growth.
➖Lateral Meristem is found in stem or root region and helps in their growth.
➖Intercalary meristem is found at the base of the leaves or internodes (on twigs) and helps in growth.
🔸Permanent Tissue
Cells of meristematic tissue later differentiate to form different types of permanent tissue.
Permanent Tissue is further categorized as −
➖Simple Permanent Tissue and
➖Complex Permanent Tissue
🔸Simple Permanent Tissue
Simple Permanent Tissue further categorized as −
➖Parenchyma
➖Collenchyma
➖Sclerenchyma
➖Epidermis
🔸Parenchyma tissue provides support to plants and also stores food.
🔸Sometimes, parenchyma tissue contains chlorophyll and performs photosynthesis, in such a condition, it is known as collenchyma.
🔸The collenchyma tissue provides flexibility to plant and also provides mechanical support (to plant).
🔸The large air cavities, which are present in parenchyma of aquatic plants, give buoyancy to the plants and also help them float, are known as aerenchyma.
🔸The Sclerenchyma tissue makes the plant hard and stiff. For example, the husk of a coconut is made up of sclerenchymatous tissue.
🔸The cells of Sclerenchyma tissue normally are dead.
🔸The outermost layer of cells is known as epidermis.
🔸The epidermis is usually made up of a single layer of cells.
🔸The entire surface of a plant has the outer covering of epidermis, which protects all the parts of the plant.
🔷Complex Permanent Tissue
The complex tissue, normally, consists of more than one type of cells which work together as a unit.
Complex tissues help in the transportation by carrying organic material, water, and minerals up and down in the plants.
🔸Complex Permanent Tissue is categorized as;
➖Xylem
➖Phloem
🔸Xylem, normally, consists of tracheid, vessels, xylem parenchyma, and xylem fibers.
🔸Xylem is accountable for the conduction of water and mineral ions/salt.
🔸Phloem, normally, is made up of four types of elements namely −
➖Sieve tubes
➖Companion cells
➖Phloem fibers and
➖Phloem parenchyma
🔸Phloem tissue transports food from leaves to other parts of the plant.
Tissues are categorized as −
Plant Tissue
Animal Tissue
♦️Plant Tissue
Following are the major types of plant tissue −
➖Meristematic Tissues
➖Permanent Tissues
▪️Simple Permanent Tissues
➖Parenchyma
➖Collenchyma
➖Sclerenchyma
➖Epidermis
▪️Complex Permanent Tissue
➖Xylem
➖Phloem
▪️Meristematic Tissue
➖Meristematic tissue mainly consists of actively dividing cells, and helps in increasing the length and thickening the stems of the plant.
➖Meristematic tissue, commonly, present in the primary growth regions of a plant, for example, in the tips of stems or roots.
➖Depending on the region (where the meristematic tissues are found); meristematic tissues are classified as apical, lateral, and intercalary (see the image given below).
➖Apical meristem (as shown in the above image) is present at the growing tips of stems and roots and helps in their growth.
➖Lateral Meristem is found in stem or root region and helps in their growth.
➖Intercalary meristem is found at the base of the leaves or internodes (on twigs) and helps in growth.
🔸Permanent Tissue
Cells of meristematic tissue later differentiate to form different types of permanent tissue.
Permanent Tissue is further categorized as −
➖Simple Permanent Tissue and
➖Complex Permanent Tissue
🔸Simple Permanent Tissue
Simple Permanent Tissue further categorized as −
➖Parenchyma
➖Collenchyma
➖Sclerenchyma
➖Epidermis
🔸Parenchyma tissue provides support to plants and also stores food.
🔸Sometimes, parenchyma tissue contains chlorophyll and performs photosynthesis, in such a condition, it is known as collenchyma.
🔸The collenchyma tissue provides flexibility to plant and also provides mechanical support (to plant).
🔸The large air cavities, which are present in parenchyma of aquatic plants, give buoyancy to the plants and also help them float, are known as aerenchyma.
🔸The Sclerenchyma tissue makes the plant hard and stiff. For example, the husk of a coconut is made up of sclerenchymatous tissue.
🔸The cells of Sclerenchyma tissue normally are dead.
🔸The outermost layer of cells is known as epidermis.
🔸The epidermis is usually made up of a single layer of cells.
🔸The entire surface of a plant has the outer covering of epidermis, which protects all the parts of the plant.
🔷Complex Permanent Tissue
The complex tissue, normally, consists of more than one type of cells which work together as a unit.
Complex tissues help in the transportation by carrying organic material, water, and minerals up and down in the plants.
🔸Complex Permanent Tissue is categorized as;
➖Xylem
➖Phloem
🔸Xylem, normally, consists of tracheid, vessels, xylem parenchyma, and xylem fibers.
🔸Xylem is accountable for the conduction of water and mineral ions/salt.
🔸Phloem, normally, is made up of four types of elements namely −
➖Sieve tubes
➖Companion cells
➖Phloem fibers and
➖Phloem parenchyma
🔸Phloem tissue transports food from leaves to other parts of the plant.
👍10❤4🤩1
A block has a mass of 2 kg. If the weight of the block is measured on the surface of the Earth and on another planet, which of the following statements is true?
Anonymous Quiz
43%
The mass remains the same on both the Earth and the planet.
20%
The mass is greater on the planet than on the Earth.
27%
The weight is greater on the Earth than on the planet.
9%
The weight is the same on both the Earth and the planet.
👍4
What is the primary function of the mitochondria in a cell?
Anonymous Quiz
14%
Protein synthesis
20%
Cell division
64%
Energy production
2%
Waste management
❤1
Two masses, (m_1) and (m_2), are separated by a distance (r). If the distance is halved, what happens to the gravitational force between them?
Anonymous Quiz
12%
It becomes half
56%
It becomes four times
23%
It becomes twice
9%
It remains the same
👍3
The velocity of light (c) and Planck's constant (h) are related by the equation c = λν, where λ is the wavelength and ν is the frequency. What are the dimensions of Planck's constant (h)?
Anonymous Quiz
28%
[M][L²][T⁻³]
37%
[M][L²][T⁻²]
29%
[M][L³][T⁻¹]
6%
[M][L][T⁻²]
❤2