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Module 4 Vocab

Apologia Marine Biology

TermDefinition
Osculum a large opening on a sponge through which filtered water is expelled
Amoebocytes cells within a sponge that produce its skeletal structure, perform digestion, and repair cell damage
Gemmule a group of cells surrounded by a shell made of spicules
Metamorphosis a complete morphological change from larval to adult form
Spherical Symmetry a body form in which any cut through the organism's center results in identical halves
Radial Symmetry a body form in which any longitudinal cut (along the length) through the organism's central axis results in identical halves
Bilateral Symmetry a body form in which only one longitudinal cut through the organism's center results in identical halves
Polyp an attached cnidarian stage, appearing sac-like or barrel-like
Medusa a free-swimming cnidarian stage, appearing bell-like or umbrella-like
Mesoglea a jelly-like substance between the inner layer and outer layer of cells in a cnidarian
Dorsal referring to the top (or back) surface of an animal
Ventral referring to the bottom (or belly) surface of an animal
Mutualism a relationship between two or more organisms of different species where both benefit from the association
Commensalism a relationship between two or more organisms of different species where one benefits and the other is neither harmed nor benefited
Parasitism a relationship between two or more organisms of different species where one benefits and the other is harmed
Coelom a body cavity within organisms containing specialized tissue
Gills extensions of the body containing thin-walled blood vessels that allow for easy absorption of oxygen from the outside surface
Created by: larmstrong3
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