Pharyngeal groove

Pharyngeal groove
Pattern of the branchial arches. I-IV branchial arches, 1-4 pharyngeal pouches (inside) and/or pharyngeal grooves (outside) a Tuberculum laterale b Tuberculum impar c Foramen cecum d Ductus thyreoglossus e Sinus cervicalis
Details
Latin	sulcus pharyngei
Identifiers
Code	TE E5.4.2.0.0.0.3
Anatomical terminology

A pharyngeal groove (or branchial groove, or pharyngeal cleft^[1]) is made up of ectoderm unlike its counterpart the pharyngeal pouch on the endodermal side.

The first pharyngeal groove produces the external auditory meatus (ear canal).^[2] 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.

References

^ "musom.marshall.edu". Retrieved 2009-05-28.
^ http://isc.temple.edu/marino/embryology/parch98/ARCHI97/Img016.gif

External links

http://isc.temple.edu/marino/embryology/parch98/parch_text.htm

Development of the head and neck

Face

Nasal placode
Nasal pit
Nasal prominences
- Lateral
- Medial
Intermaxillary segment
Frontonasal prominence
Maxillary prominence
Mandibular prominence
- Meckel's cartilage

Oral cavity

Palate	Primary palate Secondary palate

Tongue	Lateral lingual swelling Tuberculum impar Copula linguae Hypopharyngeal eminence Gustatory placode

General	Branchial apparatus Pharyngeal groove Cervical sinus Pharyngeal arch 1st 2nd Pharyngeal pouch

Index of the mouth

Description

Disease	Congenital

Treatment

Categories

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Pharyngeal groove