Question

Match the items given in column I with those in column II and select the correct option given below.

Column I	Column II
Aa)Tricuspid valve	1. Between left atrium
(B)Bicuspid valve	2. Between right ventricle and pulmonary artery
(C)Semilunar valve	3. Between right atrium and right ventricle

a. A – 1, B – 2, C – 3
b. A – 3, B – 1, C – 2
c. A - 2, B -1, C – 3
d. A – 1, B – 3, C – 2

Answer 1

Heart contains various types of valves at the entry and exit and blood from the heart. The main function of the valves is to prevent the backflow of the blood. Tricuspid and bicuspid valves are present between atrium and ventricles. The deoxygenated blood from the right ventricle is carried by the pulmonary artery.

Complete answer:
Heart is part of the circulatory system. It performs a very important function in transport of oxygenated and deoxygenated blood. The valves are present at the entry and exit of the blood in the heart.
The unidirectional flow of blood from the atrium to the ventricles or from the ventricle to the aorta or pulmonary trunk is regulated and maintained by the heart valves. The valve present between the right atrium and the right ventricle is called a tricuspid valve. It stops the backflow of blood from the right ventricle into the right atrium.
The valves present between the left atrium and left ventricle are called bicuspid valves. The backflow of blood from the left ventricle into the left atrium can be prevented by the bicuspid valve.
The valve present between the left ventricle and pulmonary artery is called a semilunar valve.

Thus, the correct answer is option B that is A – 3, B – 1, C – 2.

Note:
Humans contain four chambered hearts that includes two atriums and two ventricles. The valves are present between the right atrium and right ventricles and similarly in the left side. The pulmonary artery carries deoxygenated blood from the heart to the lungs to become oxygenated and this oxygenated blood reaches to the heart via pulmonary veins. Aorta transports blood throughout the body.