PROTECTION
Cell membrane: Protect against the world outside
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Structure: The cell membrane is edge of life; it is the boundary that separates the living cell from its non-living surroundings. A remarkable film! The membrane surround the cell.Lipids and proteins are the staple ingredients of membranes, although carbohydrates may also be present. Plant cells have an additional covering outside the membrane called the cell wall.The cell wall is composed of a nonliving substance called cellulose. It strengthens plant tissue. The cell wall is one of the features of plant cell that distinguish them from animal cell. Function: The cell membrane is so thin and delicate that liquids may pass in and by a process known as osmsis. It is an efficient device for absorbing nourishment.It also provides protection to the cell. |