The cardiac cycle is defined as a sequence of alternating contraction and relaxation of the atria and ventricles in order to pump blood throughout the body. ... In other words, when the atria are in diastole, the ventricles are in systole and vice versa.
squash and strech because it is the most important, and therefore, most stress full to do, it is also the most usefull because it gives charicters and objects gravity, weight, mass and flexibility
