Question

State whether the following statements are true or false.

(xii) The aorta and pulmonary artery are guarded by semilunar valves.

• A. True
• B. False

Answer 1

The correct option is A True

Valves in the human heart:

1. The muscular flaps or structures that make the flow of blood unidirectional are known as valves.
2. The human heart has four valves namely - the tricuspid valve, pulmonary semilunar valve, mitral valve, and aortic valve.

Semilunar valves:

1. The semilunar valves are present at the edges of the arteries - the pulmonary artery and aorta.
2. These valves guard the aorta and the pulmonary artery and help to prevent the backflow of blood supplied by them.

The given statement is true.