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The Five aortic arches serves as hearts.
5
earthworms have a closed circulatory system
the three main part are solar system and digestive system and excretory system
The intestine.
Earthworms
Earthworms do not have respiratory systems. They exchange oxygen through their skin.
closed circulatory system
earthworms have a closed circulatory system
closed circulatory system
Electric-wiring system
nervous