if we have a cell devoid of motion and if we regard the protoplasm in any region as made up of successive portions , a , b , c , d , etc. , as we pass from left to right ) we may suppose that a reaction starts in b which results in a temporary loss of volume by electrostriction , so that liquid moves from a to b to fill the void thus created .
C0007634
cell
C0175996
protoplasm