Question

If due to some injury the Chordae tendineae of the tricuspid valves of the human heart is partially non-functional, what will be the immediate effects?
A. The flow of the blood in the pulmonary artery will be reduced.
B. The flow of blood into the aorta will slow down.
C. The pacemaker will stop working
D. The blood will tend to flow back into the left atrium.

Answer 1

Hint: The tricuspid valves are present between the right atrium and the right ventricle of the heart and prevents the backflow of the blood into the right atrium.

Complete answer: 1. Chordae tendineae have a very important function in the human heart it is present between the tricuspid valves and the mitral valves of the heart. It is a leaf-like structure suspended between the tricuspid valves and mitral valves of the heart.
2. It maintains the position and tension in the valves at the end of each and every systole of the heart.
3. Chordae tendineae is made up of the papillary muscles and a fibrous head and a leaflet like structure.
4. It keeps the flaps of the tricuspid valves close during the Ventricle contraction to avoid the backward flow of the blood into the atrium.
5. The Chordae tendineae tense the cups of the valves during the relaxing time to avoid the regurgitation of the blood back into the atrium.
6. So, If the Chordae tendineae of the tricuspid valves got injured due to any reason then the amount and flow of blood in the pulmonary artery will be reduced.
7. As it is also connected with the mitral valves and mitral valves prevents the backward flow of the blood into the right ventricle from the pulmonary arteries. Hence the flow of blood gets reduced in the pulmonary artery.

So the option A is correct.

Note: The bicuspid valves are present between the left atrium and the left ventricle and have two leaflets like structure whereas in tricuspid there is three leaflets like structures are present.