2021 · Q17
In the human body, blood flows through a process of double circulation. Which one of the following statements is true in this regard?
General KnowledgeBiology
- AOxygenated blood reaches the left side of the heart from the lungs.
- BBlood in the left side of the heart is poor in oxygen and is brought to the right side of the heart.
- CDeoxygenated blood form the left side of the heart is brought to the lungs for oxygenation.
- DOxygenated blood from the right side of the heart is sent around the body.
Explanation
In double circulation, deoxygenated blood is pumped from the right ventricle through the pulmonary artery to the lungs, and oxygenated blood returns via the pulmonary veins to the left atrium. Thus oxygenated blood reaches the left side of the heart from the lungs. The left side never carries deoxygenated blood to the lungs, and the right side never sends oxygenated blood around the body.