Question

During one cycle how many times blood goes into the heart of the fish and why ?
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CBSE - 10 - SCIENCE - BOARD​

Answer 1

Answer:

In fishes, the blood passes through the heart once only . This circulation is known as single circulatory system.

Gills are present in fishes which purifies the blood. Deoxygenated blood moves from heart to the gills for the cleaning process and then this oxygenated blood is pumped back to all the other parts of the body.

Explanation:

Answer 2

Answer:

part 4

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