invaginate planula
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planula — Name given by Lankester to a coelenterate embryo when it consists of the two primary germ layers only, the ectoderm and endoderm. [L. dim. of planum, flat surface] invaginate p. SYN: gastrula. * * * plan·u·la (planґu lə) 1. a larval… … Medical dictionary
gastrula — The embryo in the stage of development following the blastula; in lower forms with minimal yolk, it is a simple double layered structure consisting of ectoderm and endoderm enclosing the archenteron, which opens to the outside by way of the… … Medical dictionary
animal — animalic /an euh mal ik/, animalian /an euh may lee euhn, mayl yeuhn/, adj. /an euh meuhl/, n. 1. any member of the kingdom Animalia, comprising multicellular organisms that have a well defined shape and usually limited growth, can move… … Universalium
Walter Garstang — (February 9, 1868 February 23, 1949), a Fellow of Lincoln College, Oxford, was a marine biologist and zoologist who was one of the first to study the functional biology of marine invertebrate larvae. His best known works on marine larvae were his … Wikipedia
