BGDB Face and Ear - Late Embryo
Practical 6: Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities |
Primary Palate
The animation on the left 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.
Face - 5 prominences
otic vesicle development (inner ear) pharyngeal arch (middle, external ear)
Tongue Development Contributions from all arches which changes with time begins as swelling rostral to foramen cecum median tongue bud
Skull cranial vault chondrochranium
Week 8
Carnegie stage 22
Optic and Nasal Region
A5: Root of nose with interorbital ligament behind. Developing calvaria. Olfactory bulbs.
A6: Nose. Interorbital ligament. Nasal septum and nasal capsule. Eyes and eyelids. Thalamus/hypothalamus. Part of circle of Willis.
A7: Eyes. Nasal septum. Middle conchae. Sphenoid cartilage.
B1: Optic nerve.
B2: Neurohyophysis and adenohypophysis. Remnant of Rathke's pouch (residual lumen) in adenohypophysis. Trigeminal ganglion. Internal carotid arteries. Vomeronasal organs, lateral to nasal septum. Nasal plug (transient). Nasal conchae.
B3: Trigeminal nerve and ganglion, with maxillary division emerging. Pterygopalatine ganglion. Nasalconchae. Adenohypophysis.
B4: Tongue. Otic capsule. Cochlea. Between B3 and B4, the junction of nasopharynx and oropharynx.
B5: Tongue with palatal process either side. Pharyngotympanic tubes (Eustachian tube -derived from pharyngeal pouch 1). External ear pinna.
=Palate
Hearing
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Cite this page: Hill, M.A. (2024, June 18) 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