Chambers of the Heart/Valve (The Cardiovascular System: Heart)

Four valves of the heart:

Pulmonary valve, Aortic valve, mitral valve, tricuspid valve.

The right atrium

Receives oxygen-poor venous blood from the systemic circuit through the superior vena cava and the inferior vena cava.

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The heart consists of four chambers and four valves that regulates blood flow. Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium.

4 chambers of the heart:

The right atrium, the right ventricle, the left atrium, the left ventricle.

Tricuspid valve

This valve is between the right atrium and the right ventricle. The function of the valve is to prevent back flow of blood into the right atrium

Pulmonary valve

This valve is opened by the increased blood pressure of the ventricular systole (contraction of the muscular tissue), pushing blood out of the heart and into the artery.

Mitral valve

This valve permits blood to flow from the left atrium into the left ventricle, but not in the reverse direction.

The left ventricle

This ventricle has the thickest wall of any heart chamber. The extra - thick myocardium enables it to develop enough pressure to force blood around the entire systemic circuit; by comparison the right ventricle, which has a relatively thin wall, must push blood to the lungs and then back to the heart.

Aortic valve

a semilunar valve between the aorta and the left ventricle of the heart that prevents the blood from flowing back into the left ventricle.

Mitral valve and Tricuspid valve

Known as atrioventricular valves. Both control blood flow from the atria to the ventricles.

Aortic valve and Pulmonary valve

Knows as semilunar valves. Controls blood flow out of the ventricles. The aortic valve separates the left ventricle from the aorta, while the pulmonary valve separates the right ventricle from the pulmonary artery. As the ventricles contract, the semilunar valves open and blood is pumped into the major arteries.

The right ventricle

Oxygen-poor venous blood travels from the right atrium into the right ventricle through a broad opening founded by three fibrous flaps.

The left atrium

Oxygen-rich blood from the lungs enters the left atrium through the pulmonary vein. The blood is then pumped into the left ventricle chamber of the heart through the mitral valve. From there, the blood is ready to be pumped into the body to deliver oxygen-rich blood to all bodily tissues.