In the cardiac cycle,which statement is true?
A)All blood is actively pumped from the ventricles.
B)Most blood is actively pumped from the atria.
C)All blood is actively pumped into the ventricles.
D)Most blood is actively pumped into the atria.

Question

Quizplus · Accepted Answer

During the cardiac cycle, all blood is actively pumped from the ventricles into the pulmonary and systemic circulation. The atria serve mainly as reservoirs for blood, receiving and storing blood until the ventricles are ready to contract and pump it out. Therefore, option A is the correct choice.

In the Cardiac Cycle,which Statement Is True