Right atrium
Medical term · R
The right upper chamber of the heart; it receives partially deoxygenated blood as it returns from the body's tissues and moves it into the right ventricle for distribution to the lungs.
Related terms
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Right ventricleThe right lower chamber of the heart; it receives blood from the right atrium for distribution to the lungs.
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VentricleOne of the two lower chambers of the heart. The right ventricle pumps blood to the lungs; the left ventricle pumps blood to the rest of the body.
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AtriaThe upper chambers of the heart. There are two of these—the right atrium and the left atrium.
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Atrioventricular nodeAlso known as the AV node. A major part of the electrical system in the heart that acts as a gateway between the atria and the ventricles. An electrical signal generated by the…