File:Stage13 bf6.jpg

From Embryology

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Human Embryo Carnegie Stage 13

5mm Embryo appears as Carnegie Stage 13 from ectopic pregnancy.

  • Embryo is enclosed in amniotic membrane.
  • Larger cavity is chorionic space (coelom).
  • Placental villi are visible on left of image.


Embryo Links: Embryo and Placenta | Embryo | Embryo (label) | Embryo (animated) | Embryo (animated large) | Head region | Head region (label) | Body region | Body region (label) | Carnegie stage 13
Stage 13 Links: Week 4 | Week 5 | Somitogenesis | Placodes | Head | Movies | Lecture - Early Vascular | Lecture - Gastrointestinal | Lecture - Head Development | Science Practical - Gastrointestinal | Science Practical - Head | Carnegie Embryos | Category:Carnegie Stage 13 | Next Stage 14
  Historic Papers: 1905 Embryo 148 | 1926 Precervical Sinus | 1945 | 1955

Stage 13

  • Week 4-5, 26 - 30 days, 3 - 5 mm, Somite Number 21 - 29
  • Ectoderm: Neural tube continues to close, Caudal neuropore closes, forebrain
  • Mesoderm: continued segmentation of paraxial mesoderm (21 - 29 somite pairs), heart prominence
  • Head: 1st, 2nd and 3rd pharyngeal arch, forebrain, site of lens placode, site of otic placode, stomodeum
  • Body: heart, liver, umbilical, early upper limb bulge


Image: Dr Steven O'Connor (Houston, Texas) - Other embryo images.


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, March 1) Embryology Stage13 bf6.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Stage13_bf6.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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current11:01, 12 August 2011Thumbnail for version as of 11:01, 12 August 2011901 × 676 (80 KB)S8600021 (talk | contribs)
08:00, 12 August 2011Thumbnail for version as of 08:00, 12 August 2011901 × 676 (77 KB)S8600021 (talk | contribs)
07:59, 12 August 2011Thumbnail for version as of 07:59, 12 August 2011901 × 676 (77 KB)S8600021 (talk | contribs)
07:53, 12 August 2011Thumbnail for version as of 07:53, 12 August 2011901 × 676 (73 KB)S8600021 (talk | contribs)==Human Embryo Carnegie Stage 13== 5mm Embryo appears as Carnegie Stage 13 from ectopic pregnancy. * Embryo is enclosed in amniotic membrane. * Larger cavity is chorionic space (coelom). * Placental villi are visible on left of image. '''Stage 13''' * W