File:Stage9 dorsal.jpg
Stage9_dorsal.jpg (287 × 378 pixels, file size: 5 KB, MIME type: image/jpeg)
Human Embryo Carnegie Stage 9 (late)
Features: embryonic disc, primitive node, primative streak, primative groove, somites, neural groove, brain plate region, connecting stalk, cut edge of amnion
Facts: Week 3, 19 - 21 days, 1.5 - 2.5 mm, Somite Number 1 - 3
View 1: embryonic disc, showing the epiblast viewed from the amniotic (dorsal) side.
Stage 9 Labelled | Stage 9 Molecular | Stage 9 SEM | Stage 10
Events: Ectoderm - Neural plate brain region continues to expand, neural plate begins folding over the notochord.
Mesoderm - segmentation of paraxial mesoderm begins (1 - 3 somite pairs), cardiac primordium forms
Identify: neural groove and neural folds, the mesoderm, which segments beside the neural groove to form somites but extends laterally to margin of embryonic disc lateral plate mesoderm, where it merges with the covering extraembryonic mesoderm.
The intra-embryonic coelom develops in the middle of the lateral plate mesoderm. Note amniotic ectoderm covered by extramebryonic mesoderm (empty spaces above and below the mesoderm are artefacts, as are the lateral folds in the ectoderm).
- 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
Image source: The Kyoto Collection images are reproduced with the permission of Prof. Kohei Shiota and Prof. Shigehito Yamada, Anatomy and Developmental Biology, Kyoto University Graduate School of Medicine, Kyoto, Japan for educational purposes only and cannot be reproduced electronically or in writing without permission.
Image Source: UNSW Embryology, no reproduction without permission. UNSW Embryology Carnegie Stage 9
Original file name: CSt9b.gif
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:12, 5 August 2009 | 287 × 378 (5 KB) | S8600021 (talk | contribs) | Carnegie Stage 9 Features: embryonic disc, primitive node, primative streak, primative groove, somites, neural groove, brain plate region, connecting stalk, cut edge of amnion Facts: Week 3, 19 - 21 days, 1.5 - 2.5 mm, Somite Number 1 - 3 View 1: embryo | |
22:11, 5 August 2009 | 291 × 384 (5 KB) | S8600021 (talk | contribs) | Carnegie Stage 9 Features: embryonic disc, primitive node, primative streak, primative groove, somites, neural groove, brain plate region, connecting stalk, cut edge of amnion Facts: Week 3, 19 - 21 days, 1.5 - 2.5 mm, Somite Number 1 - 3 View 1: embryo |
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File usage
The following 19 pages use this file:
- 2017 Group Project 6
- Carnegie Stages
- Carnegie stage 9
- Carnegie stage 9 gallery
- Carnegie stage table
- Embryonic Development
- Kyoto Collection
- Lecture - Mesoderm Development
- Paper - A Human Embryo of Twenty-five Somites
- Paper - A Human Embryo of Twenty-seven Pairs of Somites, Embedded in Decidua
- Paper - Report upon the collection of human embryos at the Johns Hopkins University (1911)
- Paper - Two presomite human embryos
- Somitogenesis
- Talk:2017 Group Project 6
- Talk:Carnegie Stages
- Template:Carnegie stage somites table
- Template:Carnegie stage table
- Template talk:Carnegie stage table
- History:Paper - A Human Embryo of Twenty-seven Pairs of Somites, Embedded in Decidua