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more about gastrula
gastrula |
4 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Stomapoda \Sto*map"o*da\, n. pl [NL. See {Stoma}, and {-poda}.] (Zo["o]l.) An order of Crustacea including the squillas. The maxillipeds are leglike in form and the large claws are comblike They have a large and elongated abdomen, which contains a part of the stomach and heart; the abdominal appendages are large and bear the gills. Called also {Gastrula}, {Stomatopoda}, and {Squilloidea}. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Planula \Plan"u*la\, n.; pl {Planul[ae]}. [L., a little plane.] 1. (Biol.) In embryonic development, a vesicle filled with fluid, formed from the morula by the divergence of its cells in such a manner as to give rise to a central space, around which the cells arrange themselves as an envelope; an embryonic form intermediate between the morula and gastrula. Sometimes used as synonymous with {gastrula}. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Gastrula \Gas"tru*la\, n.; pl {Gastrul[ae]}[NL., dim. fr Gr ? the stomach.] (Biol.) An embryonic form having its origin in the invagination or pushing in of the wall of the planula or blastula (the blastosphere) on one side thus giving rise to a double-walled sac, with one opening or mouth (the blastopore) which leads into the cavity (the archenteron) lined by the inner wall (the hypoblast). See Illust. under {Invagination}. In a more general sense an ideal stage in embryonic development. See {Gastr[ae]a}. -- a. Of or pertaining to a gastrula. From WordNet r 1.6 [wn]: gastrula n : double-walled stage of the embryo succeeding the blastula
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