Question

Explain double circulation of blood. Why is it called so? Why is it necessary?​

Answer 1

Answer:

In human beings, the blood goes through the heart twice during each cycle i.e. the blood passes through the human heart two times to supply once to the whole body. So, it is called Double Circulation of blood.

Types of double circulation

The double circulation of blood includes:

(i) Systematic Circulation

(ii) Pulmonary Circulation

It is necessary for a human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system more efficient and helps in maintaining constant body temperature.

Explanation:

Answer 2

It is necessary for a human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system more efficient and helps in maintaining constant body temperature.