The inner germ layer that develops into the lining of the digestive and respiratory systems

Wikipedia Word definitions in Wikipedia
The hypoblast is a tissue type that forms from the inner cell mass . It lies beneath the epiblast and consists of small cuboidal cells. Extraembryonic endoderm (including Yolk sac ) is derived from hypoblast cells. The absence of hypoblast results in multiple ...

WordNet Word definitions in WordNet
n. the inner germ layer that develops into the lining of the digestive and respiratory systems [syn: endoderm , entoderm , endoblast , entoblast ]

Wiktionary Word definitions in Wiktionary
n. (context embryology English) A type of tissue that forms from the inner cell mass and later is incorporated into the endoderm

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Hypoblast \Hy"po*blast\, n. [Pref. hypo- + -blast.] (Biol.) The inner or lower layer of the blastoderm; -- called also endoderm , entoderm , and sometimes hypoderm . See Illust. of Blastoderm , Delamination , and Ectoderm .