Lateral |
Ventral (More? Large rotated image) |
Carnegie Stage 12Facts: Week 4, 26 - 30 days, 3 - 5 mm, Somite Number 21 - 29 View: Lateral view, day 26, 27 somites, Amniotic membrane removed. 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 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 Next: |
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The Kyoto Collection images are reproduced with the permission of Prof. Kohei Shiota for tutorial/revision purposes and cannot be reproduced electronically or in writing without permission.
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