In closed circulatory system, blood is enclosed by:
Important Questions on Respiration and Circulation
Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence beginning with the first word that is underlined:
Artery, Capillaries, Venule, Vein, Arteriole.
| 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. |
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
Which one of the following graphs best describes the Blood Pressure (BP) change when blood moves from aorta to capillaries?
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.
Correct statement/s regarding open circulatory system is/are-
a. Heart
b. Lungs
c. Liver
d. Spleen
e. Gills
(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?
