File:Stage9 bf1.jpg: Difference between revisions

Human embryo

Stage 9 day 20, somites 3-4

Ventrolateral view (cut chorionic) showing the embryo, yolk sac and amniotic sac.

Note:

1. the relative size of the embryo and the associated extra-embryonic coeloms.
2. the shape of the early folded embryonic disc and rostro-caudal bendings.
3. the caudal attachment of the embryo to the chorionic wall.
4. the relative thicknesses of the embryo and extra-embryonic membranes.

Original file name: Stage9day20somites3-4lateralbf1v2.jpg

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