1122 Chapter human heart: CHAMMBERS OF HEART(human heart anatomy , chambers of human heart
29 Nov 2022
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The heart consists of four chambers: the two atria and the two ventricles. Blood returning to the heart enters the atria, and is then pumped into the ventricles. From the left ventricle, blood passes into the aorta and enters the systemic circulation. From the pulmonary circulation via the pulmonary arteries. it enters the right, The right atrium receives deoxygenated blood the superior and inferior vena cavae, and from the coronary veins. It pumps this blood through the right atrioventricular orifice (guarded by the tricuspid valve) into the right ventricle. from. In the anatomical position, the right atrium forms the right border of the heart. Extending from the antero-medial portion of the chamber is the right auricle (right atrial appendage) a muscular pouch that acts to increase the capacity of the atrium. The interior surface of the right atrium can be divided into two parts, each with a distinct embryological origin.
