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Earn 100

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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Match the items given in Column I with those in Column II and select the correct option given below:
 
  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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Blood pressure in the mammalian aorta is maximum during
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Purkinje fibres are located in the following structure/s
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
Read the following statements:
(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?
HARD
What is vasomotor tone?
HARD
Write the features that distinguish between the open and closed circulatory systems.
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Correct statement/s regarding open circulatory system is/are-

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Which of the following vertebrate organ/s receives only oxygenated blood?

a. Heart
b. Lungs
c. Liver
d. Spleen
e. Gills
MEDIUM
In order for the blood to flow from right atrium to left ventricle in mammalian heart, it must flow through
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The organ that receives only oxygenated blood is

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What is the role of the circulatory system in energy production?