Question

Name the blood vessel that brings (i) oxygenated blood (ii) deoxygenated blood to the human heart. Also name that chamber of the heart which receives deoxygenated blood and state how deoxygenated blood from this chamber is sent to lungs for oxygenation.

Hint:

Deoxygenated blood enters the right atrium, then moves to the right ventricle, which pumps it to the lungs for oxygenation via the pulmonary artery. Oxygenated blood returns through the pulmonary veins to the left atrium.

Answer 1

(i) Oxygenated Blood to the Heart:
The oxygenated blood is carried to the heart by the pulmonary veins, which bring oxygen-rich blood from the lungs to the left atrium of the heart. (ii) Deoxygenated Blood to the Heart:
The deoxygenated blood is carried to the heart by the superior and inferior vena cavae, which bring oxygen-poor blood from the body to the right atrium of the heart. The deoxygenated blood enters the right atrium.
From the right atrium, the blood is pumped into the right ventricle.
The right ventricle then pumps the deoxygenated blood through the pulmonary artery to the lungs for oxygenation. Thus, deoxygenated blood from the right atrium is sent to the lungs for oxygenation through the pulmonary artery.