File:Stage7-sem2.jpg

From Embryology

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Human Embryo Carnegie stage 7

17 days, pre-somite, scanning electron micrograph image

Embryonic disc (epiblast/ectoderm layer) dorsal view, with amniotic membrane partially removed.

Primitive node (Henson's node) in centre of disc and primitive streak, shown as indentation in disc is extending to the bottom of image. Connecting stalk is shown at the bottom of image.

See also Stage7-sem1.jpg image original orientation.


Stage 7 Links: Carnegie stage 7 | Gastrulation | Notochord | Week 3 | Image 1 - Stage 7 SEM | Image 2 - Stage 7 SEM



Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline


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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current13:15, 21 August 2009Thumbnail for version as of 13:15, 21 August 2009590 × 800 (98 KB)MarkHill (talk | contribs)Human Embryo Carnegie stage 7, 17 days, pre-somite, scanning electron micrograph image Embryonic disc (epiblast/ectoderm layer) dorsal view, with amniotic membrane partially removed. Primitive node (Henson's node) in centre of disc and primitive streak