ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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left and right ventricle contract and and tricuspid and bicuspid valve closes
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right atrium and right ventricle contracts and tricuspid and bicuspid valve open.
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left and right ventricle contract and and tricuspid and bicuspid valve open
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left atrium and left ventricle contract and tricuspid and bicuspid valve closes
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Detailed explanation-1: -The ventricles contract due to the ventricular depolarization and the pressure inside the ventricles rapidly increases. Immediately after a ventricular contraction begins, the pressure in the ventricles exceeds the pressure in the atria and thus the atrioventricular valves shut.
Detailed explanation-2: -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.
Detailed explanation-3: -A muscle contraction forces the blood through the tricuspid valve into the right ventricle. When the right ventricle contracts, blood is forced through the pulmonary semilunar valve into the pulmonary artery. Then it travels to the lungs. In the lungs, the blood receives oxygen then leaves through the pulmonary veins.