axial hypoblast
a hypoblast consisting of mesodermal and probably endodermal precursor cells developing on the dorsal midline. It includes prechordal plate and chorda mesoderm

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • paraxial hypoblast — found lateral to the axial hypoblast and formed mostly or entirely of mesoderm. It forms somites and their derivatives in the trunk and muscles and endothelium in the head …   Dictionary of ichthyology

  • prechordal plate — axial hypoblast located anterior to the chorda mesoderm …   Dictionary of ichthyology

  • animal development — Introduction  the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by …   Universalium

  • notochord — 1. In primitive vertebrates, the primary axial supporting structure of the body, derived from the notochordal or head process of the early embryo; an important organizer for determining the final form of the …   Medical dictionary

  • Mesoderm — Tissues derived from mesoderm …   Wikipedia

  • Chordamesoderm — Transverse section of a chick embryo of forty five hours’ incubation. * Chordamesoderm: yellow, at notochord. * Paraxial mesoderm: red, at somite. * Intermediate mesoderm …   Wikipedia

  • notochord — notochordal, adj. /noh teuh kawrd /, n. Embryol. a rodlike cord of cells that forms the chief axial supporting structure of the body of the lower chordates, as amphioxus and the cyclostomes, and of the embryos of the vertebrates. [1840 50; NOTO + …   Universalium

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