๐ท๐ท๐ท๐ท๐ท๐ท๐ผ๐๐ ๐ผ๐ฝ๐๐๐ ๐๐๐๐๐๐๐๐ท๐ท๐ท๐ท
Tissues are categorized as −
๐บPlant Tissue
๐บAnimal Tissue
❀❀❀Plant Tissue❀❀❀
Following are the major types of plant tissue −
➖Meristematic Tissues
➖Permanent Tissues
๐พSimple Permanent Tissues๐พ
➖Parenchyma
➖Collenchyma
➖Sclerenchyma
➖Epidermis
❀๐ธComplex Permanent Tissue๐ธ❀
➖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.
๐Permanent Tissue
Cells of meristematic tissue later differentiate to form different types of permanent tissue.
๐Permanent Tissue is further categorized as −
➖Simple Permanent Tissue and
➖Complex Permanent Tissue
๐ฅSimple Permanent Tissue
Simple Permanent Tissue further categorized as −
➖Parenchyma
➖Collenchyma
➖Sclerenchyma
➖Epidermis
๐ผParenchyma tissue provides support to plants and also stores food.
๐ธSometimes, parenchyma tissue contains chlorophyll and performs photosynthesis, in such a condition, it is known as collenchyma.
๐ผThe collenchyma tissue provides flexibility to plant and also provides mechanical support (to plant).
๐ธThe 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.
๐ผThe Sclerenchyma tissue makes the plant hard and stiff. For example, the husk of a coconut is made up of sclerenchymatous tissue.
๐ธThe cells of Sclerenchyma tissue normally are dead.
๐ผThe outermost layer of cells is known as epidermis.
๐ธThe epidermis is usually made up of a single layer of cells.
๐ผThe entire surface of a plant has the outer covering of epidermis, which protects all the parts of the plant.
๐ปComplex Permanent Tissue
The complex tissue, normally, consists of more than one type of cells which work together as a unit.
๐บComplex tissues help in the transportation by carrying organic material, water, and minerals up and down in the plants.
๐Complex Permanent Tissue is categorized as;
➖Xylem
➖Phloem
๐บXylem, normally, consists of tracheid, vessels, xylem parenchyma, and xylem fibers.
๐ผXylem is accountable for the conduction of water and mineral ions/salt.
๐ธPhloem, normally, is made up of four types of elements namely −
➖Sieve tubes
➖Companion cells
➖Phloem fibers and
➖Phloem parenchyma
๐ธPhloem tissue transports food from leaves to other parts of the plant.
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