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4 Cards in this Set
- Front
- Back
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blood pumped by one or more hearts. High pressure from closed vessels allows for faster travel. Blood can be directed to specific tissues. Supports high oxygen demand.
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closed circulatory system
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Extracellular fluid and circulatory system combined, insects mullusks, pretty inefective
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open circulatory system
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.head
.thorax .abdomen |
three main body parts of an athropod
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they share the same body, the parasite lives off host
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relationship between parasite and its host
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