hypoblast /hy·po·blast/ (hi´po-blast) the embryonic precursor to the endoderm.hypoblas´tic
hypoblast
endoderm [en´do-derm]
hy·po·blast (h  p -bl st )n. See endoderm. hy po·blastic adj. |
hypoblast
[hī′pōblăst]
Etymology: Gk, blastos, germ
the lower layer of the bilaminar embryonic disk in a human embryo, present during the second week, that gives rise to the endoderm.
endoderm [en´do-derm]
the innermost of the three primary germ layers of the embryo; from it are derived the epithelium of the pharynx, respiratory tract (except the nose), digestive tract, bladder, and urethra. Called also endoblast, entoderm, entoblast, and hypoblast.
hypoblast
the entoderm.
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