Question

what do you mean by double circulation?why it is necessary?

Answer 1

Answer:

During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.

hope it helps you.

Answer 2

Double Circulation :

In Double Circulation, blood in the body passes through the heart twice in each cycle.

It includes Systemic Circulation from heart to body and Pulmonary Circulation from heart to lungs.

It is important because:

1. It prevents mixing of oxygenated and deoxygenated blood.
2. It allows the highly efficient supply of oxygen to the body.
3. In animals like Birds and Animals, it maintains the body temperature by using energy constantly.