The wall of which part of the heart is very thick?
Important Questions on Body Fluids and Circulation
Match the following related to the cardiac cycle.
| Column I | Column II | ||
| Cardiac Cycle | |||
| Atrial Systole | |||
| Ventricular Systole | |||
| Cardiac Diastole | |||
Statement (S): The sinoatrial node is called 'Pace-maker'.
Reason (R): The sinoatrial node contains specialised cardiomyocytes and generates action potentials without any external stimuli.
The correct answer is
Reason (R): In the heart of the human embryo, oxygenated and deoxygenated blood is completely separated.
Give the location of the following valve within the human heart.
Thebesian valve
Select the best option from the following statements:
(i) Frog is a poikilothermic
(ii) Frog does not have any coronary circulation
(iii) Heart is "myogenic" in nature
(iv) Heart is autoexcitable
Give the location of the following valve within the human heart.
Tricuspid valve
Give the location of the following valve within the human heart.
Bicuspid valve
| Column A | Column B |
| P. Neurogenic heart. | i. Human |
| Q. Bronchial heart. | ii. King crab |
| R. Pulmonary heart. | iii. Shark |
Give the location of the following valve within the human heart.
Eustachian valve.
Assertion : Dub' is one of the sounds of the heart caused during a cardiac cycle.
Reason : The sound is due to closure of semilunar valves present at the bases of aortic arches.
