Question

Explain blood circulation in human heart.

Answer 1

Oxygen-poor blood is collected from body parts through superior and inferior vena cava into the right atrium of the heart, which is then pumped to lungs through the pulmonary artery.

Then the oxygen-rich blood from the lungs is transferred to the left atrium through the pulmonary vein, which is then pumped to all other body parts through the aorta.