embryonic blastoderm

embryonic blastoderm
the region of the blastoderm forming the embryo proper.

Medical dictionary. 2011.

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  • embryonic disk — or embryonic disc n 1 a) BLASTODISC b) BLASTODERM 2) the part of the inner cell mass of a blastocyst from which the embryo of a placental mammal develops called also embryonic shield …   Medical dictionary

  • Blastoderm — A Blastoderm is the layer of cells formed at one pole of the yolky egg of birds. The yolk prevents the division from taking place through the egg, resulting in meroblastic cleavage during the many cleavage divisions. At the pole containing less… …   Wikipedia

  • blastoderm — early embryonic tissue composed of blastomeres arranged in a sheet like fashion; used to refer to embryonic tissue before embryonic axis formation …   Dictionary of ichthyology

  • embryonic disk — noun 1. a. : blastodisc b. : blastoderm 2. or embryonic shield : the part of the inner cell mass of a blastoc …   Useful english dictionary

  • embryonic disk — noun Date: circa 1938 1. a. blastodisc b. blastoderm 2. the part of the inner cell mass of a blastocyst from which the embryo of a placental mammal develops called also embryonic shield …   New Collegiate Dictionary

  • blastoderm, blastoderma — The thin, disk shaped cell mass of a young embryo and its extraembryonic extensions over the surface of the yolk; when fully formed, all three primary germ layers (ectoderm, endoderm, and mesoderm) are present …   Medical dictionary

  • embryonic anideus — a blastoderm in which no embryonic axis develops …   Medical dictionary

  • embryonic axis — an elongate thickening of blastoderm tissue; the primitive differentiation of the embryo …   Dictionary of ichthyology

  • blastoderm — n. [Gr. blastos, bud; derma, skin] The primary epithelium formed in early embryonic development of many invertebrates; germinal membrane …   Dictionary of invertebrate zoology

  • shield — A protecting screen; lead sheet for protecting the operator and patient from x rays. [A.S. scild] embryonic s. a thickened area of the embryonic blastoderm from which the embryo develops. nipple s. a cap or dome placed over the …   Medical dictionary

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