chamber from where oxygenated blood is pumped out to various part of the body
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Your heart uses its four valves to ensure your blood flows in only one direction. Healthy valves open and close in coordination with the pumping action of your heart's atria and ventricles.
Each valve has a set of flaps called leaflets or cusps that seal or open the valve. The cusps allow pumped blood to pass through the chambers and into your blood vessels without backing up or flowing backward.
Oxygen-poor blood from the vena cavae fills your heart's right atrium. The atrium contracts (atrial systole). The tricuspid valve located between the right atrium and ventricle opens for a short time and then shuts. This allows blood to enter the right ventricle without flowing back into the right atrium.
When your heart's right ventricle fills with blood, it contracts (ventricular systole). The pulmonary valve located between your right ventricle and pulmonary artery opens and closes quickly.
This allows blood to enter into your pulmonary arteries without flowing back into the right ventricle. This is important because the right ventricle begins to refill with more blood through the tricuspid valve. Blood travels through the pulmonary arteries to your lungs to pick up oxygen.
Oxygen-rich blood returns from the lungs to your heart's left atrium through the pulmonary veins. As your heart's left atrium fills with blood, it contracts. This event is called atrial systole.
The mitral valve located between the left atrium and left ventricle opens and closes quickly. This allows blood to pass from the left atrium into the left ventricle without flowing backward.
As the left ventricle fills with blood, it contracts. This event is called ventricular systole. The aortic valve located between the left ventricle and aorta opens and closes quickly. This allows blood to flow into the aorta. The aorta is the main artery that carries blood from your heart to the rest of your body.
The aortic valve closes quickly to prevent blood from flowing back into the left ventricle, which already is filling up with new blood.
SVC: Superior vena cava
IVC: Inferior vena cava
PV: Pulmonic Valve
LA: Left Atrium
RA: Right Atrium
RV: Right Ventricle
LV: Left Ventricle
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