How categories of blood takes place

1.	How categories of blood takes place
Answer» Differences between arteries, veins and capillaries:\xa0\tArteryVeinCapillary(i) It is a thick walled blood vessel.It is a thin walled blood vessel.It is an extremely narrow blood vessel having very thin walls.(ii) It carries blood from the heart to different parts of the body.It brings blood from the different parts of the body to the heart.They form an extensive network throughout all living cells in the body and connect arteries and veins.(iii) It can dilate or constrict depending on the regulatory requirement of the body.It cannot dilate or constrict.It can dilate or constrict according to the requirement of the tissue.(iv) It does not contain any valve.It contains simple valves which permit blood flow only towards the heart.It does not contain any valves.\t\xa0

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