The heart consists of four chambers, two atria (upper chambers) and two ventricles (lower chambers). There is a valve through which blood passes before leaving each chamber of the heart. What do you know about these heart valves? Check all the statements that are TRUE.
The heart valves prevent the backward flow of blood.
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As the left atrium contracts, more blood flows into the right ventricle.
The aortic valve is located between the left ventricle and the aorta.
The pulmonary valve is located between the left ventricle and the pulmonary artery.
After the left ventricle contracts, the aortic valve closes and the mitral valve opens, to allow blood to flow
from the left atrium into the left ventricle.
Each valve actually has three flaps, except the mitral valve, which has two flaps.