Pharyngeal groove Pattern of the branchial arches. I-IV branchial arches, 1-4 branchial pouches (inside) and/or pharyngeal grooves (outside)
a Tuberculum laterale
b Tuberculum impar
c Foramen cecum
d Ductus thyreoglossus
e Sinus cervicalis
Latin sulcus pharyngei Gray's subject #13 65 Code TE E220.127.116.11.0.0.3
The first pharyngeal groove produces the external auditory meatus. The rest (2, 3, and 4) are overlapped by the growing 2nd pharyngeal arch, and form the floor of the depression termed the cervical sinus, which opens ventrally, and is finally obliterated.
- Pharyngeal+groove at eMedicine Dictionary
Human development of head and neck (GA 1.65, TE E5.3, 5.4) Face Oral cavityPrimary palate · Secondary palateGeneral
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