Respuesta :
Pressure variations on either side of the heart valve lead it to open and close passively. The valve's leaflets are blown open when there is increased pressure behind it, allowing blood to flow through. The leaflets, however, snap shut and the blood flow is blocked when the pressure in front of the valve is higher.
What causes the heart's valves to close?
The tricuspid and mitral valves open as a result of the contraction of the two atrial chambers, allowing blood to flow to the ventricles. The tricuspid and mitral valves must close as the two ventricle chambers contract, while the pulmonary and aortic valves must open.
The heart's valves open due to what mechanism?
The aortic valve opens and the mitral valve closes when the left ventricle compresses. This ensures that blood enters the aorta and then travels to the rest of the body. The right ventricle also unwinds as the left ventricle does. As a result, the tricuspid valve opens and the pulmonary valve closes.
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