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William Harvey is known for the discovery of

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Important Questions on Body Fluids and Circulation
MEDIUM
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

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Column – I | Column – II | ||
a. | Tricuspid valve | i. | Between left atrium and left ventricle. |
b. | Bicuspid valve | ii. | Between the right ventricle and pulmonary artery. |
c. | Semilunar valve | iii. | Between the right atrium and right ventricle. |

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MEDIUM
Given below are groups of terms. In each group the first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis. Example: Oxygen : Inspiration : : Carbon dioxide : Expiration.
Foetus : Amnion : : Heart : _____. Explain in detail.

MEDIUM
(i) Pulse can be felt on a vein.
(ii) The inner lining of the blood vessel is called the endothelium.
(iii) The cardiac tissue present in the wall of the heart is supplied by the coronary artery.
(iv) Both renal and hepatic portal systems are present in humans.
Which of the above statements are correct?

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HARD

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Splenic artery arises from

HARD

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Correct statement/s regarding open circulatory system is/are-

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a. Heart
b. Lungs
c. Liver
d. Spleen
e. Gills

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The organ that receives only oxygenated blood is

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