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4 Cards in this Set
- Front
- Back
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closed circulatory system
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a circulatory system in whidh the heart circulates blood through a network of vessels that form a closed loop;the blood does not leave the blood vessels,and materials 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
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3 main body parts of an arthropod
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head,thorax,and abdomen
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realationship between parsites and host
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parsites feed off of the host and sometimes makes them die
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