BGDB Face and Ear - Early Embryo: Difference between revisions
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==Structures derived from Arches== | ==Structures derived from Arches== | ||
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''' Arch''' | |||
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'''Nerve''' | |||
| width="22%" | | |||
'''Muscles''' | |||
| width="25%" | | |||
'''Skeletal''' | |||
| width="18%" | | |||
'''Artery''' | |||
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<center>1<br>(maxillary/mandibular)</center> | |||
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<center>trigeminal (V)</center> | |||
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mastication<br>(temporalis, masseter, medial pterygoid, lateral pterygoid) | |||
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Meckel's cartilage<br>mandible modelmalleus, incus | |||
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maxillary(terminal branches) | |||
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<center>2<br>(hyoid)</center> | |||
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<center>facial (VII)</center> | |||
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facial expression<br>(buccinator, platysma, stapedius, stylohyoid, digastric posterior belly) | |||
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Reichert's cartilage<br>stapes, styloid process, lesser cornu of hyoid, upper part of body of hyoid bone | |||
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stapedial (embryonic)<br>corticotympanic (adult) | |||
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<center>3</center> | |||
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<center>glossopharyngeal (IX)</center> | |||
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stylopharyngeus | |||
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greater cornu of hyoid, lower part of body of hyoid bone | |||
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common carotid, internal carotid (root) | |||
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<center> 4 and 6 </center> | |||
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<center>superior laryngeal and recurrent laryngeal branch of vagus (X)</center> | |||
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intrinsic muscles of larynx, pharynx; levator palati | |||
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thyroid, cricoid, arytenoid, corniculate and cuneform cartilages | |||
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4 - aortic arch, right subclavian<br>6 - ductus arteriosus, pulmonary (roots) | |||
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==Structures derived from Pouches== | ==Structures derived from Pouches== |
Revision as of 13:40, 15 April 2011
Practical 6: Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities |
Week 4
During week 4 a number of features appear visible on the embryo surface:
At the level of the body somite bulges and limb buds appear. At the level of the head sensory placodes and pharyngeal arches appear.
Carnegie Stage 12 to 14
Week 4
Week 5
Sensory Placodes
Pharyngeal Arches
Stage 13 Pharyngeal Arches
Look through the cross-sections of the stage 13 embryo observing and identfying structures of the face and ear visible at this stage.
Stage 13 Pharynx
Structures derived from Arches
Arch |
Nerve |
Muscles |
Skeletal |
Artery |
(maxillary/mandibular) |
|
mastication |
Meckel's cartilage |
maxillary(terminal branches) |
(hyoid) |
|
facial expression |
Reichert's cartilage |
stapedial (embryonic) |
|
|
stylopharyngeus |
greater cornu of hyoid, lower part of body of hyoid bone |
common carotid, internal carotid (root) |
|
|
intrinsic muscles of larynx, pharynx; levator palati |
thyroid, cricoid, arytenoid, corniculate and cuneform cartilages |
4 - aortic arch, right subclavian |
Structures derived from Pouches
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
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Cite this page: Hill, M.A. (2024, June 2) Embryology BGDB Face and Ear - Early Embryo. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDB_Face_and_Ear_-_Early_Embryo
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G