Embryonic Structure
hypoblast Audio
hy·po·blast [ hahy-puh-blast ]
Definitions related to hypoblast:
  • Part of the bilaminar blastoderm that forms from the inner cell mass and contributes to the development of the yolk sac.
    NCI
    U.S. National Cancer Institute, 2021
  • The inner germ layer of a BLASTOCYST or BLASTULA, precursor of endoderm.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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