ANATOMY AND PHYSIOLOGY

circulatory system, and use . hemolymph. or . blood. as the circulatory fluid. B.Invertebrates with an Open or a Closed System Circulatory System. II. Transport in Vertebrates. 1.Vertebrates have a closed circulatory system called a . cardiovascular system. a.The atria. are the chambers of the heart that receive blood. b.The. ventricles. pump ... ................
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