Question

Why is the structure of heart inbirds and mammals different from that of fishes?

Answer 1

Answer:

Explanation:

Structure of Heart: The heart of fishes consists of four chambers, a sinus venosus, an atrium, a ventricle and a conus or a bulbus arteriosus (Fig. 6.1a-b). Some authors considered atrium and ventricles as the chambers of heart while some considered sinus venosus and conus arteriosus also as the chambers of the heart.

Answer 2

$\underline \mathbb{ANSWER}$

$\underline \mathbb{IN\:MAMMALS\:BIRDS}$

1. heart is four- chambered there is separation of oxygenated blood from deoxygenated blood in all including humans.

2.This allows a highly efficient supply of oxygen to the body.

3. This is because these animals have high energy needs.

4. They use this energy to maintain their body temperature they are called warm blooded animals.

$\underline \mathbb{IN\:FISHES}$

1. Two chambered heart is present and the blood is pumped to the gills where it get oxygenated and supply directly to the rest of the body

2. Blood ghost only once through the heart during one cycle of circulation.

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