Compare and contrast the circulatory systems of... - SS2 Biology Transport/Circulatory System Question

Compare and contrast the circulatory systems of simple multicellular organisms and mammals. How do these systems adapt to the respective organisms' needs?

Simple multicellular organisms have an open circulatory system, where hemolymph is pumped by a heart-like structure and directly bathes the tissues. Mammals, on the other hand, have a closed circulatory system with a four-chambered heart and specialized blood vessels that allow for efficient oxygen and nutrient delivery to body tissues.

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