Carnegie stage 20: Difference between revisions
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== Introduction == | |||
===Facts=== | |||
Week 8, 51 - 53 days, 18 - 22 mm | |||
===Events=== | |||
Events | Events | ||
Ectoderm: sensory placodes, lens pit, otocyst, nasal pits moved ventrally, fourth ventricle of brain | Ectoderm: sensory placodes, lens pit, otocyst, nasal pits moved ventrally, fourth ventricle of brain | ||
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Head: forebrain, eye, external acoustic meatus | 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 | |||
{{Template:Carnegie_stages}} | {{Template:Carnegie_stages}} | ||
==Kyoto Collection== | ==Kyoto Collection== | ||
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View: This is a dorsolateral view of embryo. Amniotic membrane removed. | View: This is a dorsolateral view of embryo. Amniotic membrane removed. | ||
Image source: [http://embryology.med.unsw.edu.au/wwwhuman/Stages/ | Image source: [http://embryology.med.unsw.edu.au/wwwhuman/Stages/stage20.htm Embryology page Created: 19.03.1999] | ||
{{Template:Carnegie_stages}} | {{Template:Carnegie_stages}} |
Revision as of 12:44, 4 September 2009
Introduction
Facts
Week 8, 51 - 53 days, 18 - 22 mm
Events
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
- 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
Kyoto Collection
View: This is a dorsolateral view of embryo. Amniotic membrane removed.
Image source: Embryology page Created: 19.03.1999
- 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.
Cite this page: Hill, M.A. (2024, June 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