Biology / Unit 2 Bio 0283 short lesson, about 20 seconds
The Plant Cell Wall
Captions available
The idea
The plant cell wall is a rigid covering outside the plasma membrane, built mainly from the polysaccharide cellulose, that protects the cell and gives it shape.
In practice
Biting into raw celery crunches because teeth tear through the rigid cellulose walls of its cells.
Where people slip
A plant wall's chief molecule, cellulose, differs from the peptidoglycan of most prokaryotic walls.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Something wrong in this lesson? Flag it · Sources for Biology