BGDB Face and Ear - Late Embryo: Difference between revisions
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{{BGDB Face}} | {{BGDB Face}} | ||
==Primary Palate== | ==Week 6== | ||
===Primary Palate=== | |||
* During week 6 there is fusion of the upper lip. | |||
* Formed by the maxillary prominences of of the first pharyngeal arch and the frontonasal prominence. | |||
* Failure of this embryonic process leads to '''cleft lip'''. | |||
<gallery> | |||
File:Stage16 em01.jpg|Image - stage 16 | |||
File:Stage17 em02.jpg|Image - stage 17 | |||
File:Stage18 em01.jpg|Image - stage 18 | |||
File:Stage19 em01.jpg|Image - stage 19 | |||
</gallery> | |||
{{Lip EM images 16-19}} | |||
[[File:Stage16-18_face.jpg|600px]][[File:Bailey140.jpg|300px]] | [[File:Stage16-18_face.jpg|600px]][[File:Bailey140.jpg|300px]] | ||
Revision as of 08:02, 20 May 2013
Practical 6: Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities |
Week 6
Primary Palate
- During week 6 there is fusion of the upper lip.
- Formed by the maxillary prominences of of the first pharyngeal arch and the frontonasal prominence.
- Failure of this embryonic process leads to cleft lip.
- EM Links: Image - stage 16 | Labeled Image - stage 16 | Image - stage 17 | labeled Image - stage 17 | Image - stage 18 | Labeled Image - stage 18 | Image - stage 19 | Labeled Image - stage 19 | Palate Development
SEM Image Source: Prof Virginia Diewert
- 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, June 3) Embryology BGDB Face and Ear - Late Embryo. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDB_Face_and_Ear_-_Late_Embryo
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
Above images show face development through week 6 to week 7 (1mm scale markings).
The animation shows the early fusion of the primary palate in the human embryo between stage 17 and 18, going from an epithelial seam to the mesenchymal bridge.
<Flowplayer width="420" height="500" autoplay="true">Face_001.flv</Flowplayer> |
This animation shows a ventral view of development of the human face from approximately week 5 through to neonate.
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Week 8
Selected Head Images: B4 - Choroid Plexus | B5 - Cochlea | B6 - Cochlea
Palate
The dark "pear-shaped" central structure at the top is the developing tongue. The two pale regions either side are the palatal shelves, note that they have not yet fused in the midline (failure of this process is cleft palate).
Hearing
Behind that a pale cartilagenous region (that later ossifies) encloses the structuctures of the inner ear, beside which middle ear bones are forming. On the righthand side of the head the external ear is visible. The lower half of the image shows the developing brainstem with a large ventricular space occupied in part by an extensive choroid plexus (manufacturer of cerebrospinal fluid).
Embryonic External Ear
Shown below are the changes in external ear development between week 5 to week 8. Development changes from a series of 6 hillocks on arch 1 and arch 2 (week 5) to a structure resembling the adult ear (week 8).
Practical 6: Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities |
BGDB: Lecture - Gastrointestinal System | Practical - Gastrointestinal System | Lecture - Face and Ear | Practical - Face and Ear | Lecture - Endocrine | Lecture - Sexual Differentiation | Practical - Sexual Differentiation | Tutorial
Glossary Links
- Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link
Cite this page: Hill, M.A. (2024, June 3) Embryology BGDB Face and Ear - Late Embryo. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDB_Face_and_Ear_-_Late_Embryo
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G