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 the lungs for oxygenation. 

Hint:

The pulmonary circulation moves deoxygenated blood to the lungs for oxygenation, while the systemic circulation moves oxygenated blood to the body. The pulmonary veins and arteries carry blood in the opposite directions compared to other veins and arteries in the body.

Answer 1

(i) Oxygenated blood: The pulmonary vein delivers oxygenated blood to the human heart. This vein transports oxygen-rich blood from the lungs to the left atrium of the heart.

(ii) Deoxygenated blood: The superior and inferior vena cava bring deoxygenated blood to the human heart. These veins carry deoxygenated blood from the body to the right atrium of the heart.

Chamber receiving deoxygenated blood: The right atrium receives deoxygenated blood. Blood enters this chamber from the superior and inferior vena cava.

How deoxygenated blood is sent to the lungs for oxygenation: After entering the right atrium, deoxygenated blood is pumped into the right ventricle. The right ventricle then contracts, sending the blood through the pulmonary artery to the lungs for oxygenation. The pulmonary artery carries the deoxygenated blood to the lungs, where carbon dioxide is exchanged for oxygen.