Question

trace the evolution of heart in terms of number of Chambers from fishes to mammals. Explain ​

Answer 1

Explanation:

this might be helpful to some extent

Answer 2

the most primitive type of heart is found in the fishes and the most developed type of heart is found in the birds and the mammals

Explanation:

• the heart is 2 chambered. That is the heart consists of the Atrium and ventricle.

• However in case of the amphibians there is only one ventricle but to 8 cm which is present in the heart. In his of the reptiles there is four chambered heart but the four Chambers are incompletely developed and there is mixing of blood.

• However in case of the birds and the mammals they have completely develop 4 chambered heart in which there is no mixing of oxygenated and deoxygenated blood.

To know more about heart in chordates,

Regarding position of heart :- 1. In Chordates : dorsal 2. In Non ...

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