Diffusion is one of the methods by which water and some other liquids and gases can pass through the membrane of animal cells and plant cells. Random spontaneous movement of molecules caused by thermal agitation is known to be the cause of diffusion. In process of diffusion, molecules move from a region of higher to one of lower concentration. By diffusion water can move from one cell to the other cell and gradually travel across the plant or animal organ.

What factors affect diffusion through cell membrane?