Carnegie stage 20: Difference between revisions
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File:Lewis1920 fig15.jpg|Skull - Lateral view of part of cartilaginous and membranous skull. | File:Lewis1920 fig15.jpg|Skull - Lateral view of part of cartilaginous and membranous skull. | ||
File:Lewis1920 fig16.jpg|Skull - Dorsal view of temporal and occipital cartilages. | File:Lewis1920 fig16.jpg|Skull - Dorsal view of temporal and occipital cartilages. | ||
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Dickie JK. [[Paper_-_The Anatomy of the Head End of a 20 mm Human Embryo|The Anatomy of the Head End of a 20 mm Human Embryo]]. J Anat Physiol. 1914 Jul;48(Pt 4):445-60. PMID 17233010 | |||
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File:Dickie1914 fig01.jpg|Fig 1. Profile view of the embryo | |||
File:Dickie1914 fig02.jpg|Fig 2. Front view of embryo | |||
File:Dickie1914 fig03.jpg|Fig 3. Lateral surface model of brain and cranial nerves | |||
File:Dickie1914 fig04.jpg|Fig 4. Shows medial aspect of model of brain | |||
File:Dickie1914 fig05.jpg|Fig 5. Sketch of nerves in occipital region | |||
File:Dickie1914 fig06.jpg|Fig 6. Model of the upper air passages | |||
File:Dickie1914 fig07.jpg|Fig 7. Lsteral wall of the nasal cavity | |||
File:Dickie1914 fig08.jpg|Fig 8. Medial wall of nose | |||
File:Dickie1914 fig09.jpg|Fig 9. Lateral aspect of the membranous labyrinth | |||
File:Dickie1914 fig10.jpg|Fig 10. Medial aspect of the membranous labyrinth | |||
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File:Streeter1921 fig26.jpg|Left lateral view of larger blood-vessels of the brain. | File:Streeter1921 fig26.jpg|Left lateral view of larger blood-vessels of the brain. | ||
File:Streeter1921_fig03.jpg|Dural venous system. | File:Streeter1921_fig03.jpg|Dural venous system. | ||
File:Human embryonic shoulder girdle 02.jpg|Human embryonic shoulder girdle | File:Human embryonic shoulder girdle 02.jpg|Human embryonic shoulder girdle | ||
</gallery> | </gallery> | ||
{{Carnegie_stages}} | {{Carnegie_stages}} | ||
Revision as of 08:35, 16 November 2015
Embryology - 27 Apr 2024 Expand to Translate |
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Introduction
Facts
Week 8, 51 - 53 days, 18 - 22 mm
Gestational age GA week 10
Events
- Ectoderm: sensory placodes, lens pit, otocyst, nasal pits moved ventrally, fourth ventricle of brain
- Mesoderm: heart prominence, ossification continues
- Head: forebrain, eye, external acoustic meatus
Features
- scalp vascular plexus, eylid, eye, nose, external acoustic meatus, auricle of external ear, arm, elbow, wrist, liver prominence, digital rays
- Identify: straightening of trunk, pigmented eye, eyelid, nose, external acoustic meatus, scalp vascular plexus, digital rays, liver prominance, thigh, ankle, foot plate, umbilical cord
- Links: Week 8 | System Development | Lecture - Limb | Lecture - Head Development | Lecture - Sensory | Science Practical - Head | Science Practical - Sensory | Science Practical - Urogenital | Historic - Skull Development | Category:Carnegie Stage 20 | Stage 21
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 |
- 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
Bright Field
Virtual Embryo Slides
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Kyoto Collection
View: This is a dorsolateral view of embryo. Amniotic membrane removed.
Image source: Embryology page Created: 19.03.1999
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.
Carnegie Collection
- Carnegie stage 20: 8517 Right | 8517 Anterior | 8517 Left | 7906 Right | 7906 Anterior | 7906 Left | 7274 Right | 7274 Anterior | 7274 Left
iBook - Carnegie Embryos | |
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Blechschmidt Collection
Embryo (130758)
- Links: Blechschmidt Collection
Additional Images
Historic Images
Dickie JK. The Anatomy of the Head End of a 20 mm Human Embryo. J Anat Physiol. 1914 Jul;48(Pt 4):445-60. PMID 17233010
- 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, April 27) Embryology Carnegie stage 20. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_20
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G