File:Stage12 sem3.jpg

Human Embryo Caudal Neuropore (Carnegie stage 12)

Dorsolateral view, day 26, 25 somites, amniotic membrane removed.

This is an SEM image of the human embryo (Carnegie stage 12, week 4) caudal end. There is a Bright field image version also available.

The neural tube is now shown closed at the caudal neuropore (posterior neuropore).

Image version links: Large 1200px | 1000px | Medium 600px | Small 400px

Neural

SEM Images

Stage 12 SEM Images: Bright Field 1 | Bright Field 3 | Bright Field 3 | SEM1 | SEM2 | SEM3 | SEM4 dorsolateral head and arches | SEM5 lateral head and arches | SEM6 ventrolateral head and arches | SEM7 lateral | SEM8 ventrolateral | SEM9 cloacal membrane | SEM9 labeled | Carnegie stage 12

Stage 12

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

Reference

Müller F & O'Rahilly R. (1987). The development of the human brain, the closure of the caudal neuropore, and the beginning of secondary neurulation at stage 12. Anat. Embryol. , 176, 413-30. PMID: 3688450

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