Question

Distinguish between parenchyma, collenchyma and sclerenchyma tissue with the help of well labeled diagrams.

Answer 1

Answer:

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Explanation:

Parenchyma:Parenchyma is a term used to describe the functional tissues in plants and animals. This tissue is “functional” – performing tasks such as photosynthesis in plants or storing information in the human brain – as opposed to “structural” tissues like wood in plants or bone in animals.

In plants, parenchyma refers to a specific type of ground tissue with thin cell walls and the ability to grow and divide.

Parenchyma makes up most of the cells within leaves, flowers, and fruits. Hard, structural features such as bark, outer coverings, and major veins in these structures are “structural” rather than “parenchymal” tissue.

Collenchyma:Collenchyma, in plants, support tissue of living elongated cells with irregular cell walls. Collenchyma cells have thick deposits of cellulose in their cell walls and appear polygonal in cross section. The strength of the tissue results from these thickened cell walls and the longitudinal interlocking of the cells. Collenchyma may form cylinders or occur as discrete strands and is one of the three ground, or fundamental, tissues in plants, together with parenchyma (living thin-walled tissue) and sclerenchyma (dead support tissue with thick cell walls).

Sclerenchyma:Sclerenchyma, in plants, support tissue composed of any of various kinds of hard woody cells. Mature sclerenchyma cells are usually dead cells that have heavily thickened secondary walls containing lignin. The cells are rigid and nonstretchable and are usually found in nongrowing regions of plant bodies, such as the bark or mature stems. Sclerenchyma is one of the three types of ground, or fundamental, tissue in plants; the other two types are parenchyma (living thin-walled tissue) and collenchyma (living support tissue with irregular walls). Sclerenchyma cells occur in many different shapes and sizes, but two main types occur: fibres and sclereids.

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Answer 2

Answer:

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Explanation:

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