Carnegie stage 13
Facts: Week 4, 26 - 30 days, 3 - 5 mm, Somite Number 21 - 29
View: Lateral view, day 26, 27 somites, Amniotic membrane removed.
Stage 12 SEM
Features: day 26, 27 somites, forebrain, site of lens placode, site of otic placode , stomodeum, 1st pharyngeal arch, 2nd pharyngeal arch, 3rdpharyngeal arch, heart prominence, somite
Identify: forebrain, site of lens placode, site of otic placode, stomodeum, 1st pharyngeal arch, 2nd pharyngeal arch, 3rd pharyngeal arch, heart prominence, somite
Next:
Events 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 source: Embryology page Created: 19.03.1999
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Cite this page: Hill, M.A. (2024, May 4) Embryology Carnegie stage 13. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_13
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
