Question

What is the need of four chambered heart in mammals while fishes have only two chambered heart? ​

Answer 1

Answer:

Mammals need more energy to maintain their body temperature that's why they have four chambered heart. In the mammals heart, the oxygenated and deoxygenated blood is not allowed to mix, and this is achieved by the separation of the heart into right side and left side. Such a separation of heart provides an efficient method of supplying oxygen to the body. Fishes have two chambered heart and oxygenation of blood takes place in the gills and passes directly to the rest of the body.

$<marquee>ItZ Shashwat here</marquee>$