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BIOLOGY

JAMB 2015 - Question 39

Biology 2015 JAMB Past Questions - Question 39: The part labelled I is the

use the diagram below to answer the questions 39 and 40

The part labelled I is the

A: pulmonary artery

B: bicuspid valve.

C: aorta

D: vena cava.

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Correct Answer

Explanation

Aorta is the largest artery in the body which arches over the heart and carries oxygenated blood to different parts of the body except the lungs. The portion labelled IV is the left ventricle which pumps oxygenated blood to the aorta. The part labelled HI is the right ventricle which pumps deoxygenated blood to the lungs through the pulmonary arteries. The part labelled II is the tricuspid valves which allows one directional flow of deoxygenated blood into the right ventricle from the right auricle. Vena cava is the largest vein in the body which carries deoxygenated blood to the heart through the right auricle.