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3 Cards in this Set
- Front
- Back
closed circulatory system
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a circulatory system in which the heart circulates blood through a network of vessels that form a closed loop; the blood does not leave the blood vessels,and materals diffuse across the walls of the vessels
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open circulatory system
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a circulatory system in which the circulatory fluid is not contained entirely within vessels; a heart pumps fluid through vessels that empty into spaces called sinuses
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3 main body parts of a arthropod
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1.head
2.thorax 3.abdomen |