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Module 4 Vocabulary

Marine Biology Mod 4 Vocab: Marine Invertebrates I

QuestionAnswer
Invertebrates Animals that do not possess a backbone
Vertebrates Animals that possess a backbone
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
Gemmulealont A group of cells surrounded by a shell made of spicules
Larva An immature stage of an animal that appears different from the adult stage
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
Gills Extensions of the body containing thin-walled blood vessels that allow for easy absorption of oxygen from the outside surface
Coelom A body cavity within organisms containing specialize tissue
Created by: mrpicard
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