Question

Examine the circulatory systom of the earthworm and the crayfish?

1. How is the circulatory system of the earthworm different from the crayfish? hypothesize as to why these differences exist (hint - consider where each lives)​

Answer 1

The circulatory system of the crayfish is an open system where the blood is contained in vessels for only part of the system. The heart is located in a pericardial sinus located in the upper part of the thorax (a sinus is a sac or cavity). The heart pumps the blood into the arteries

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