Tags: Anatomical Structure.
The right atrium (in older texts termed the right auricle which now means the right atrial appendage) is one of four chambers (two atria and two ventricles) in the hearts of mammals (including humans) and archosaurs (which include birds and crocodilians). It receives deoxygenated blood from the superior and inferior venae cavae the coronary sinus and the anterior and smallest cardiac veins and pumps it into the right ventricle through the tricuspid valve.
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