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प्रश्न
Write three types of blood vessels. Give one important feature of each.
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उत्तर
Three main types of blood vessels that are found in the human body are arteries, veins, and capillaries.
Arteries carry blood from the heart to different body parts. Veins bring blood from different body parts to the heart. Valves are present in veins to prevent the backward flow of blood. Both arteries and veins divide in the organs to form arterioles and venules respectively. The arterioles sub-divide to form thin-walled capillaries which join to form venules. Venules join to form veins. The nutrients, hormones, gases can diffuse into the tissue cells through the walls of the capillaries and vice versa. Thus, arteries, arterioles, veins, venules, and capillaries are blood vessels.
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संबंधित प्रश्न
Write one structural difference between the composition of arteries and veins.
Fill in the blank with suitable word given below:
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Which of the following statement is true (T) and which ones are false (F)? Mark T or F:
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Write in brief about the following:
Blood transfusion.
Given below is a simple diagram of the circulation of blood in a mammal showing the main blood vessels, the heart, lungs, and body tissues. The blood vessel labeled 6 contains deoxygenated blood and 2 the valve leading to it has three semi-lunar pockets.
(i) Name the blood vessels of organs marked by numbers 1 to 8.
(ii) What do you mean by the term ‘double circulation’ of blood in mammals?
(iii) What is diastole?
The diagrams given below show the cross-section of two kinds of blood vessels:
(i) Identify the blood vessels A and B. In each case give a reason to support your answer.
(ii) Name the parts numbered 1 and 2.
(iii) When are the sounds “LUBB” and “DUB” produced during a heartbeat?
(iv) Name the blood vessel that
(a) begins and ends in capillaries.
(b) supplies blood to the walls of the heart.
Multiple Choice Questions
Arteries are:
Which blood vessel is indicated by 'X' in the following diagram?
A blood vessel which pumps the blood from the heart to the entire body:
