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12 terms

Life Science Ch. 9 -3 Vocabulary

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larva
The immature form of an animal that looks very different from the adult
cnidarian
An invertebrate animal that uses stinging cells to capture food and defend itself
polyp
The cnidarian body plan characterized by a vaselike shape and which is usually adapted for life attached to an underwater surface.
medusa
The cnidarian body plan characterized by a bowl shape and adapted for a free-swimming life.
colony
A group of individual organisms living or growing together
coral reef
A diverse environment named for the coral animals that make up its stony structure
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 rectum 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