Definitions for "Hypoblast"
The inner or lower layer of the blastoderm; -- called also endoderm, entoderm, and sometimes hypoderm. See Illust. of Blastoderm, Delamination, and Ectoderm.
inner cell mass that faces blastocoel. (More? Week 2 Notes)
the inner germ layer that develops into the lining of the digestive and respiratory systems