Four Chambers of the Heart I Atriums and Ventricles

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THE FOUR CHAMBERS OF THE HEART

The human heart has four chambers which are the two ventricles and two atria (atria is the plural form of atrium).

ATRIUMS
The right and left atriums which are the upper chambers are the receiving chambers of the heart. The right atrium accepts blood from the body while the left atrium accepts blood from the lungs.

VENTRICLES
The lower chambers are the right and left ventricles which are the pumping chambers that force blood out of the heart. The right ventricle moves the blood to the lungs while the left ventricle moves the blood into the body.

The right ventricle has a thin wall because it only needs to pump the blood around the lungs at low pressure while the left ventricle has a much thicker wall because it generates the high pressure needed to push blood to the head and body.

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