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!!!!!!!!!!Phylum Echinodermata
inverts final
12
Biology
Undergraduate 3
12/20/2009

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Term
name meaning
Definition
spine skin
Term
body
Definition
coelomate
Term
adult symmetry
Definition
pentamerous (5-point) symmatry
Term
larvae symmetry
Definition
bilateral
Term
internal skeleton
Definition
many ossicles of CaCO3 or MgCO3; brittle star=articulated ossicles; sea urchin=fused ossicles
Term
connective tissue
Definition
mutable; can stiffin and soften up; collagen fibers(change in viscosity); sea cucumbers: peptides
Term
Water Vascular System
Definition
derived from coelom;closed system of fluid-filled canals; ring canal, madreporite on aboral surface, stone cana, lateral canals, radial canal, tube feet(podia)w/ ampullae(thin-walled extensions), polian vessicles and Tiedmann's bodies(some in sea stars)
Term
tube feet
Definition
locomotion, suction, duogland adhesive, ionic interaction,gas exchange, extretion, diffusion across body wall
Term
Hemal System
Definition
move nutrients throughout body, axial organ, hemal vessels
Term
nervous system
Definition
nerve network
Term
reproduction
Definition
mostly gonochorisic,multiple gonads, deuterostome
Term
development
Definition
indirect, some echinodermata w/ direct development/brooding
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