File:Trilaminar embryo.jpg: Difference between revisions

Revision as of 11:40, 24 April 2013

Trilaminar Embryo (SEM)

The embryonic disc has been broken to expose the three germ layers in this scanning electron micrograph.

Ectoderm - columnar epithelium
Mesoderm - embryonic connective tissue (mesenchyme)
Endoderm - cuboidal epithelium

The amniotic cavity would lie above the ectoderm layer.
The yolk sac would initially lie below the endoderm layer, later this would be the gastrointestinal tract within the embryo.

Image Source: Scanning electron micrographs of the Carnegie stages of the early human embryos are reproduced with the permission of Prof Kathy Sulik, from embryos collected by Dr. Vekemans and Tania Attié-Bitach. Images are for educational purposes only and cannot be reproduced electronically or in writing without permission.

Embryonic Development

File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Thumbnail	Dimensions	User	Comment
current	13:41, 23 April 2010		432 × 359 (32 KB)	S8600021 (talk \| contribs)	Trilaminar embryo (SEM) {{Template:SEM}}

You cannot overwrite this file.

File usage

The following 29 pages use this file:

@@ Line 2: / Line 2: @@
-Scanning electron micrograph showing the 3 germ cell layers.
+The embryonic disc has been broken to expose the three germ layers in this scanning electron micrograph.
 # Ectoderm - columnar epithelium
@@ Line 8: / Line 8: @@
 # Endoderm - cuboidal epithelium
+* The amniotic cavity would lie above the ectoderm layer.
+* The yolk sac would initially lie below the endoderm layer, later this would be the gastrointestinal tract within the embryo.
+----