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iosangel:
in complete sentences, compare the circulatory system of a plat and an animal
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katelyn66:
The circulatory is a system of vessels that pass through your entire body. You may read about two types of circulatory systems in animals. There are open circulatory systems in primitive organisms where you will find a heart that pumps fluids through the creature, but no complete system of vessels. More advanced organisms, including you, have closed circulatory systems where the heart is connected to a complete system of vessels. The fluids of a closed circulatory system never leave the vessels.
iosangel:
thanks
katelyn66:
@iosangel your welcome
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