Question

Which of the following events takes place during diastole in the human heart?

• A. Blood leaves the ventricle
• B. Blood enters the aorta
• C. Blood enters the ventricle
• D. Blood enters the lungs

Answer 1

Answer:

C. Blood enters the ventricle

Diastole is the phase of the cardiac cycle when the heart muscles relax aftercontraction, allowing the chambers to fill with blood. During diastole, the ventricles are relaxed, and blood flows from the atria into the ventricles as the atrioventricular(AV) valves (the tricuspid and mitral valves) open. Thus, the correct answer is Blood enters the ventricle .