File:B220849-02.jpg
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Human Embryo (CRL 4.2 mm)
Sagittal section through embryo week 4 approximately Carnegie stage 11 to 12.
Extra-Embryonic Coeloms
Spaces and membranes that lie outside the embryo.
- Amniotic cavity surrounding the entire embryo.
- Chorionic plate and villi forming the early embryonic portion of the placenta.
- Yolk sac is not visible in this particular section. The yolk sac is visible in a more lateral section from this same embryo.
Central Nervous System
Primary brain vesicles formed by large ventricular cavity with a thin wall that will later develop the central nervous system.
- Beneath the hindbrain the neural tube narrows to the spinal cord, not visible in this section. The section now passes through the lateral wall of the tube.
Cardiovascular
- Heart tube is folded and cut at the bulbus cordis (primitive atria), primitive ventricle and the truncus arteriosus.
- Embryo Image Links: labeled embryo | unlabeled embryo | yolk sac | Carnegie stage 11 | Carnegie stage 12
| 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 source: The Blechschmidt Collection images are reproduced with the permission of Prof. Christoph Viebahn, director of the Institute of Anatomy and Embryology, , University Medical Center Göttingen. Images are for educational purposes only and cannot be reproduced electronically or in writing without permission.
Cite this page: Hill, M.A. (2024, April 27) Embryology B220849-02.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:B220849-02.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:06, 8 December 2013 | | 1,311 × 849 (358 KB) | Z8600021 (talk | contribs) | ==Human Embryo (CRL 4.2 mm)== Sagittal section through embryo week 4 approximately Carnegie stage 11 to 12. {{Blechschmidt collection}} Category:HumanCategory:Week 4 |
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