Question

Explain why fish are OK with a single pump system but humans need a double pump system.

one good sentence pls!!! :)

Answer 1

A closed circulatory system can have a single or double circulatory pattern. Fish have a single circulatory pattern, wherein the blood passes through the heart only once during each complete circuit. Oxygen-deprived blood from the body tissues comes to the heart, from where it is pumped to the gills.

Explanation:

i looked it up