| pseudocoel | An internal fluid-filled body cavity within an organism other than the gut which lies between the gut (derived from the endoderm) and the muscles (derived from the mesoderm) of the outer body wall (derived from the ectoderm). It may contain other organs besides the gut. It is derived from the blastocoel during embryonic development. It is found in triploblastic animals called pseudocoelomates. (09 Oct 1997) |
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| pseudocoelia | <anatomy> The fifth ventricle in the mammalian brain. See Ventricle. Origin: NL, fr. Gr. False + hollow. Source: Websters Dictionary (01 Mar 1998) |
| pseudocoelomate | A triploblastic organism which has an internal, fluid-filled body cavity derived from the blastocoel of the embryo. This cavity surrounds the gut, may contain various other organs, and is called the pseudocoel. It differs from the coeloms of true coelomates because it is not derived from or completely lined with tissue derived from the mesoderm.The term is used to classify multicellular animals by developmental pattern. (09 Oct 1997) |