Compare circulatory systems of the earthworm, frog, and squid. Include information on major organs and vessels, blood transfer process, how the systems are similar, and how the systems differ. Explain the differences in terms of structure and environment.

The frog and squid have similar structure while the earthworm differs

Explanation:

The earthworm has two ventricles while the latter have one ventricle each

Earthworm can't survive in water but the others can survive on land and in water

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the denominator has a very specific role.