Hypoblast

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Hypoblast
Section through the embryo. (Hypoblast visible but not labeled.)
"D" points to the hypoblast.
Days 8
Precursor inner cell mass
Gives rise to endoderm
Dorlands/Elsevier h_21/12437720

The hypoblast is a tissue type that forms from the inner cell mass.[1] It lies beneath the epiblast and consists of small cuboidal cells.[2]

Extraembryonic endoderm (including Yolk sac) is derived from hypoblast.[3]

[edit] References

  1. ^ UNSW Embryology- Glossary H
  2. ^ Moore, K. L., and Persaud, T. V. N. (2003). The Developing Human: Clinically Oriented Embryology. 7th Ed. Philadelphia: Elsevier. ISBN: 0-7216-9412-8.
  3. ^ h_21/12437720 at Dorland's Medical Dictionary

[edit] External links

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Developmental biology > Human embryogenesis (development of embryo) and development of fetus (some dates are approximate - see Carnegie stages and a timeline)
Week 1
Week 2
Week 3 (Trilaminar embryo,
germ layers)
Extraembryonic/uterus
Histogenesis
Organogenesis