Question

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

Answer 1

Double Circulation:

• Circulation can be divided into two major types: single circulation and double circulation.
• The type of circulation in which blood passes through the heart twice in one complete cardiac cycle is called double circulation. It is seen in the case of mammals.

Significance of double circulation:

• The major significance of double circulation is that it prevents the mixing of oxygenated and deoxygenated blood.