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Heart valve and chamber, The heart has 4 chambers, 2 upper chambers…
Heart valve and chamber
Pulmonary valve
The pulmonary valve is one of four valves that regulate blood flow in the heart. The valve lies between the lower right heart chamber (right ventricle) and the pulmonary artery
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Aortic valve
The aortic valve lets blood from the left ventricle be pumped up (ejected) into the aorta but prevents blood once it is in the aorta from returning to the heart.
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The heart has 4 chambers, 2 upper chambers (atria) and 2 lower chambers (ventricles). Blood passes through a valve before leaving each chamber of the heart. The valves prevent the backward flow of blood. Valves are actually flaps (leaflets) that act as one-way inlets for blood coming into a ventricle and one-way outlets for blood leaving a ventricle. Normal valves have 3 flaps (leaflets), except the mitral valve. It only has 2 flaps.
In this condition, the flaps (cusps) of the aortic valve may become thickened and stiff, or they may fuse together. This causes narrowing of the aortic valve opening. The narrowed valve isn't able to open fully, which reduces or blocks blood flow from your heart into your aorta and the rest of your body
In this condition, the aortic valve doesn't close properly, causing blood to flow backward into the left ventricle.Your treatment depends on the type and severity of your aortic valve disease. In some cases you may need surgery to repair or replace the aortic valve.
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The pulmonary valve normally acts like a one-way door from your heart's right ventricle to the lungs. Blood flows from the right ventricle through the pulmonary valve to the pulmonary artery and then into the lungs, where it picks up oxygen to deliver to your body
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When the left ventricle contracts (systole), pressure rises in the left ventricle. When the pressure in the left ventricle rises above the pressure in the aorta, the aortic valve opens, allowing blood to exit the left ventricle into the aorta.
