The heart has four one way valves, which open and close with each hearfbeat
(1 point)
O Trie
O False
False
False.
The heart actually has four valves, but they do not all open and close with each heartbeat. The two atrioventricular (AV) valves, the tricuspid valve and the mitral valve, open to allow blood to flow from the atria to the ventricles during diastole (relaxation phase) and close to prevent the backflow of blood during systole (contraction phase). The two semilunar valves, the pulmonary valve and the aortic valve, open to allow blood to be ejected from the ventricles to the pulmonary artery and the aorta, respectively, during systole, and close to prevent backflow during diastole.
False.
To determine whether the statement is true or false, we need to have some knowledge about the heart and its valves.
The human heart actually has four valves, but not all of them are one-way valves. The heart has two types of valves: atrioventricular (AV) valves and semilunar valves. The AV valves include the tricuspid valve, located between the right atrium and right ventricle, and the mitral (bicuspid) valve, located between the left atrium and left ventricle. These valves open to allow blood to flow from the atria to the ventricles, and they close to prevent blood from flowing back into the atria.
The semilunar valves include the pulmonary valve, located between the right ventricle and pulmonary artery, and the aortic valve, located between the left ventricle and aorta. These valves open to allow blood to be ejected from the ventricles into the respective arteries, and they close to prevent blood from flowing back into the ventricles.
So, the correct answer is false. While the heart does have four valves, not all of them are one-way valves.