What is an open circulatory system and a closed circulatory system? What animals are they typical for?

The circulatory system is represented by the heart and blood vessels (arteries, veins, capillaries).

Distinguish between a closed circulatory system and an open one.

A closed circulatory system is a system through which blood moves only through the vessels, without pouring out into the body cavity. A closed circulatory system is found in annelids, in chordates (fish, birds, amphibians, reptiles, animals).

An open circulatory system is a system in which blood moves through the vessels, pouring out into the body cavity, washing the organs. An open circulatory system is found in mollusks.



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