Question

State reason for the following:
a) In mammals separation of oxygenated and deoxygenated blood is necessary.
b) Arteries from capillaries.

Answer 1

Answer:

A. It is necessary in mammals and birds to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.

B. Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins). ... Other tissues, such as connective tissue, have a less abundant supply of capillaries.

Answer 2

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1. Separation of oxygenated blood from deoxygenated blood allows a highly efficient supply of oxygen to the body. These animals have constant high energy requirements in order to perform various activities and maintain their body temperature.

2. On reaching an organ or tissue, the artery divides into smaller and smaller vessels, i.e., capillaries to bring the blood in contact with all the individual cells.

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