State the differences between artery, vein and capillary.


 The difference between artery, veins, and capillaries are given below:

ArteryVeinCapillary
(i) Artery is a thick-walled blood vessel. The vein is a thin-walled blood vessel. Capillary is an extremely narrow blood vessel having very thin walls.
(ii) Artery can dilate or constrict depending on the regulatory requirement of the body. Veins cannot dilate or constrict. Capillary can dilate or constrict according to the requirement of the tissue.
(iii) Artery carries blood from the heart to different parts of the body. Veins bring blood from the different parts of the body to the heart.Capillaries form an extensive network throughout all living cells in the body and connect arteries and veins.
(iv) Artery does not contain any valve. Veins contain simple valves that permit blood flow only towards the heart. Capillaries do not contain any valves. 

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Updated on: 24-Mar-2023

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