BGDB Face and Ear - Late Embryo

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, May 5) Embryology BGDB Face and Ear - Late Embryo. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDB_Face_and_Ear_-_Late_Embryo

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