Biology, asked by kavita2667, 11 days ago

why fishes have 2 chambered heart​


Answered by Mindteaser

Fish have a single circuit for blood flow and a two-chambered heart that has only a single atrium and a single ventricle (figure a). ... (b) Amphibians have two circulatory routes: one for oxygenation of the blood through the lungs and skin, and the other to take oxygen to the rest of the body.

Answered by girishnaik315pedmq6
Because blood leaves the gills and immediately circulates to the rest of the body, the heart does not require additional chambers beyond the first two. Fish and other animals with 2-chambered hearts, therefore, have simpler circulatory systems than animals with lungs and subsequently, 3- and 4-chambered hearts.
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