GLY 1010L Lecture Notes - Lecture 9: Symmetry In Biology, Bilateria, Eumetazoa
Document Summary
Together with the deuterostomes and other phyla, they make up the. Bilateria, mostly comprising animals with bilateral symmetry and three germ layers (mouth comes first) Diploblastic having a body developed from only two germ layers. Pseudocoelomate any of a group of invertebrates with a three-layered body that has a fluid-filled body cavity between the endoderm and the mesoderm (the innermost and middle tissue layers). Coelomate an animal that has a body cavity in which the internal organs are located. Members of the branch of eumetazoans possessing bilateral symmetry. Collar cells that line the body cavity and have flagella that circulate water in sponges. Cells that move using pseudopods and perform a variety of functions in animals. Found in sponges, it is the central cavity into which water is drawn to filter nutrients. Mesohyl a gelatinous region between the two layers of cells of a sponge. Osculum an opening in a sponge"s body through which water exits (mouth)
