File:Stage8 sem5.jpg

From Embryology

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Human embryo

(Stage 8, day 18)

Scanning EM dorsal view (cut amnion) showing detailed view of the embryonic disc ectoderm, neural groove, brain fold and prechordal region.

Note the rostro-caudal axis (top to bottom), the growing brain region of the neural plate (top) and shape of the folding embryonic disc.

Selected region from the image of the entire embryonic disc image, there is also a detailed image of the prechordal region.

Primitive node and streak still visible below the region where the posterior (caudal) neuropore will be located.

Note the cut edge of amniotic sac with two layers (inner ectoderm, outer extra-embryonic mesoderm)

Original image name: PresomiteStage8day18Dorsal03.jpg

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

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Yi efo/eka'e gwa ebo wo le nyangagi wuncin ye kamina wunga tinya nan

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current09:31, 22 August 2009Thumbnail for version as of 09:31, 22 August 20091,302 × 1,000 (113 KB)S8600021 (talk | contribs) Original image name: PresomiteStage8day18Dorsal03.jpg