File:Stage12 sem2.jpg

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Human Embryo Carnegie Stage 12

A ventral view of the embryo head region (Carnegie stage 12, week 4, 26 days, 25 somite pairs, CRL 5 mm). Note by this stage, one day later, than the previous stage 11 embryo, the buccopharyngeal membrane has been entirely lost.

Carnegie Stage 12

Facts: Week 4, 26 days, 5 mm, Somite Number 25

View: Ventral view, day 26, 25 somites, amniotic membrane removed

Features: stomodeum (stomatodeum), pharyngeal arch 1, brain fold


Bright field image version of this image also available.

Stage 12 Links: Week 4 | Somitogenesis | Placodes | Head | Lecture - Early Vascular | Lecture - Gastrointestinal | Lecture - Head Development | Science Practical - Gastrointestinal | Science Practical - Head | Carnegie Embryos | Category:Carnegie Stage 12 | Next Stage 13
  Historic Papers: 1907 Somites 23 | 1914 | 1914 somites 27 | 1926 Somites 22 | 1926 Precervical Sinus | 1928 Somites 23 | 1937 Somites 25
Week: 1 2 3 4 5 6 7 8
Carnegie stage: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23


Image version links: Large 1700px | 1000px | Medium 800px | Small 600px


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


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


Cite this page: Hill, M.A. (2024, May 29) Embryology Stage12 sem2.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Stage12_sem2.jpg

What Links Here?
© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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current14:32, 14 May 2011Thumbnail for version as of 14:32, 14 May 20111,787 × 2,303 (313 KB)S8600021 (talk | contribs)
13:26, 14 May 2011Thumbnail for version as of 13:26, 14 May 20111,787 × 2,303 (311 KB)S8600021 (talk | contribs)== Human Embryo Carnegie Stage 12== Carnegie Stage 12 Facts: Week 4, 26 days, 5 mm, Somite Number 25 View: Ventral view, day 26, 25 somites, amniotic membrane removed Features: stomodeum (stomatodeum) [[:File:Stage12 bf2.jpg|Bright field image versi