File:Stage11 sem5.jpg

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Human Embryo Carnegie stage 11

This is a scanning EM of the embryo dorsolateral view showing the neural tube closing with open neuropores and the paired somites visible through the thin ectoderm. Features: surface ectoderm, neural tube, cranial (anterior) neuropore, caudal (posterior) neuropore, somites, heart, cut edge of amnion, 24 days, 13 somite pairs.

  • Carnegie stage 11 24 days, 13 somite pairs
  • Stage - Week 4, 23 - 26 days, 2.5 - 4.5 mm, Somite Number 13 - 20
  • View This is a scanning EM of the embryo dorsal view showing the neural tube closing with open neuropores and the paired somites visible through the thin ectoderm.
  • Features surface ectoderm, neural tube, cranial (anterior) neuropore, caudal (posterior) neuropore, somites, heart, cut edge of amnion


Stage 11 SEM Images: dorsolateral whole embryo | dorsal embryo | lateral embryo | lateral head | lateral head with overlay | embryo cross-section | ventrolateral head | ventrolateral head with overlay | ventral head | buccopharyngeal membrane | neural crest | posterior neuropore | anterior neuropore | Carnegie stage 11


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

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 1000px | 800px | Medium 600px | Small 400px

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



Cite this page: Hill, M.A. (2024, April 24) Embryology Stage11 sem5.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Stage11_sem5.jpg

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

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Date/TimeThumbnailDimensionsUserComment
current01:18, 6 May 2010Thumbnail for version as of 01:18, 6 May 2010612 × 1,000 (59 KB)S8600021 (talk | contribs)'''Human Embryo''' Carnegie stage 11 24 days, 13 somite pairs Facts: Week 4, 23 - 26 days, 2.5 - 4.5 mm, Somite Number 13 - 20 View: This is a scanning EM of the embryo dorsal view showing the neural tube closing with open neuropores and the paired som