define cell wall write its function

1.	define cell wall write its function
Answer» The cell wall is the non-living and outermost covering of a cell consisting of cellulose and is permeable. It helps in separating the contents of the cell from the environment. It provides shape and protection to the cells and is\xa0present only in plant cells and absent in the animal cell.Cell Wall\xa0Functions\tThe plant cell wall\xa0provides definite shape, strength, rigidity, and protection against mechanical stress.\tHelps in\xa0controlling cell expansion.\tIt helps in preventing water loss from the cell.\tInvolved in\xa0transporting of substances between and across the cell.\tIt\xa0acts as a barrier between the cell interior and the outer environment. Outer layer on the plant cell is called cell wall.Its function is to provide rigidity and flexibility to plant cell

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