Question

Which of the following statement(s) is (are) true about heart?

• A. The left atrium receives oxygenated blood from different parts of the body, while right atrium receives deoxygenated blood from lungs.
• B. The left ventricle pumps oxygenated blood to different body parts, while right ventricle pumps deoxygenated blood to lungs.
• C. The left atrium transfers oxygenated blood to the right ventricle, which sends it to different body parts.
• D. The right atrium receives oxygenated blood from different parts of the body, while left ventricle pumps oxygenated blood to different parts of the body.

Answer 1

The correct option is B The left ventricle pumps oxygenated blood to different body parts, while right ventricle pumps deoxygenated blood to lungs.

A four chambered heart of birds and mammals shows double circulation in which there is complete separation of oxygenated and deoxygenated blood. The right atrium receives deoxygenated blood from body through vena cava. At the same time, left atrium receives oxygenated blood from lungs through pulmonary veins. The right atrium passes deoxygenated blood to the right ventricle and the left atrium passes the oxygenated blood to the left ventricle. In the next phase of the cardiac cycle, the right ventricle pumps deoxygenated blood to lungs through pulmonary artery for oxygenation and the left ventricle pumps oxygenated blood to the body through aorta for distribution of oxygen.

So, the correct answer is 'The left ventricle pumps oxygenated blood to different body parts, while right ventricle pumps deoxygenated blood to lungs.'