Question

The heart is a hollow muscular cone-shaped organ lying between the lungs in the thoracic cavity. In the given diagram of heart certain parts have been labelled as a, b, c, d and e. Select the correct option.

• A. The part labelled c closes shorty after the start of ventricular systole while the d closes shorty after the diastole starts.
• B. The parts labelled c and d have three and two flaps respectively.
• C. The part labelled b carries impure blood.
• D. The part labelled a carries pure blood while e carries impure blood.

Answer 1

The correct option is B The parts labelled c and d have three and two flaps respectively.

The part labelled a is the pulmonary artery which carries deoxygenated blood from right ventricle to lungs for oxygenation.

The part labelled b is the pulmonary vein which brings oxygenated blood from lungs to the left auricle.

The part labelled c and d are tricuspid and bicuspid valves with three and two cusps respectively.

The part labelled e is the vena cava which brings deoxygenated blood to he right auricle.

Thus, the correct answer is option B.