Trilaminar blastocyst

From Wikipedia, the free encyclopedia

Trilaminar blastocyst
Latin	blastocystis trilaminaris
Code	TE E6.0.1.1.4.0.1

A trilaminar embryo (or trilaminary blastoderm, or trilaminar germ disk) is an early stage in the development of triploblastic organisms, which include humans and many other animals.

It is an embryo which exists as three different germ layers - the ectoderm, the mesoderm and the endoderm. These layers are arranged on top of each other like a stack of paper, giving rise to the name trilaminar, or "three-layered".

These three layers arise early in the third week (after gastrulation) from the epiblast (a portion of the mammalian inner cell mass).

External links

trilaminar+blastoderm at eMedicine Dictionary

Swiss embryology (from UL, UB, and UF) hdisqueembry/triderm01
Embryology at UNSW Notes/week3_4
Overview at edu.mt

Developmental biology > Human embryogenesis (development of embryo) and development of fetus (TE E2.0)

First three
weeks

Week 1

Week 2
(Bilaminar)

Week 3
(Trilaminar)

Germ layers	Archenteron/Primitive streak Primitive pit Primitive knot/Blastopore Primitive groove Gastrula/Gastrulation Regional specification Embryonic disc

Ectoderm	Surface ectoderm Neuroectoderm Somatopleuric mesenchyme Neurulation Neural crest

Endoderm	Splanchnopleuric mesenchyme

Mesoderm	Chorda- Paraxial (Somite/Somitomere) Intermediate Lateral plate Intraembryonic coelom Splanchnopleuric mesenchyme/Somatopleuric mesenchyme

M: OBS

phys/devp/memb

mthr/fetu/infc, epon

proc, drug (2A/G2C)

This article is issued from Wikipedia. The text is available under the Creative Commons Attribution/Share Alike; additional terms may apply for the media files.