Circulatory systems
A) are found in all animals.
B) result in slow distribution of nutrients and gases.
C) include one or more hearts.
D) are always closed systems.
E) are all of these.

Name: Circulatory systems A) are found in all animals. B) result in slow distribution of nutrients and gases. C) include one or more hearts. D) are always closed systems. E) are all of these.
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The Answer is C

Circulatory Systems