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Mr. Park's Invertebrate Review Part 1 of 3

pgs. 692-695 (animal characteristics)
pgs. 700-705 (body plans)

AB
sessileAdjective used to describe animals that don't move from place to place.
radial symmetryAnimal body plan that can be divided along any plane through a central axis into roughly equal halves (ex: hydra and jellyfish)
bilateral symmetryAnimal body plan that can be divided down its length into left and right halves.
anteriorThe front or head end of an animal.
posteriorThe rear or tail end of an animal.
dorsalThe "back" surface of an animal.
ventralThe belly surface of an animal.
acoelomateAnimals that have a three cell layers but no body cavity.
pseudocoelomAnimals that have a fluid filled cavity partly lined with mesoderm.
coelomAnimals that have a fluid filled cavity COMPLETELY lined with mesoderm.
exoskeletonHard, waxy covering on the outside of the body that provides a framework for support and movement.
endoskeletonInternal skeleton that provides support inside an animals body.
invertebrateAnimal that DOES NOT have a backbone.
vertebrateAnimal that has a backbone.

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