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9.4
Term | Definition |
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parasite | the organism that benefits by living on or in a host in a parasitism interaction. |
host | the organism that a parasite or virus lives in or on |
free-living organism | an organism that does not live in or on other organisms. |
scavenger | a carnivore that feeds on the bodies of dead organisms. |
anus | a muscular opening at the end of the recturn through which waste material is eliminated from the body. |
closed circulatory system | a circulatory system in which blood moves only within a connected network of tubes called blood vessels. |