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
Gray's	subject #13 65

A pharyngeal groove (or branchial groove, or pharyngeal cleft^[1]) is the counterpart of the branchial pouch on the ectodermal side.

The first pharyngeal groove produces the external auditory meatus.^[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 finally obliterated.

[edit] References

[edit] See also

• Branchial cleft cyst

[edit] External links

• Pharyngeal+groove at eMedicine Dictionary
• http://isc.temple.edu/marino/embryology/parch98/parch_text.htm

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v • d • e Human development of head and neck / branchial apparatus (GA 1.65) Nose Nasal placode · Olfactory pit · nasal prominences (Lateral, Medial) · Intermaxillary segment Mouth/neck Palate Primitive palate · Secondary palate 1st arch Frontonasal prominence · Maxillary prominence · Mandibular prominence (Meckel's cartilage) Anterior tongue: Lateral lingual swelling · Tuberculum impar Thyroid (pouches 3-5) Thyroid diverticulum · Thyroglossal duct · Ultimobranchial body General Pharyngeal groove (Cervical sinus) · Pharyngeal arch (1st, 2nd) · Pharyngeal pouch (Ultimobranchial body) respiratory system navs: anat nose,larynx/lower+thoracic cavity/physio/dev, noncongen/congen/tumors, symptoms+signs/eponymous, proc mouth navs: anat/dev, noncongen/congen face/congen GI/neoplasia, symptoms, proc endocrine navs: anat/physio/dev/hormones, noncongen/congen/neoplasia, symptoms+signs/eponymous, proc

branchial arch