branchial arches


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Related to branchial arches: Branchial cyst, branchial fistula

bran·chi·al arch·es

typically, six arches in vertebrates; in lower vertebrates, they bear gills; they are pharyngeal arches in human embryos. Compare: pharyngeal arches.

branchial arches

Etymology: Gk, branchia, gills; L, arcus, bow
arched structures in the embryonic pharynx.

branchial arches

the cartilagenous or bony masses supporting the gills of fish. There are usually five pairs of arches.

bran·chi·al arch·es

(brang'kē-ăl ahr'chĕz)
Typically, six arches in vertebrates; in lower vertebrates, they bear gills; they are pharyngeal arches (q.v.) in human embryos.

branchial, branchiogenic, branchiogenous

pertaining to, or resembling, gills of a fish or derivatives of homologous parts in higher forms.

branchial arches
paired arched columns that bear the gills in lower aquatic vertebrates and which, in embryos of higher vertebrates, become modified into structures of the face, mandible, ear and neck.
branchial clefts
the clefts between the branchial arches of the embryo, formed by rupture of the membrane separating corresponding entodermal pouch and ectodermal groove.
branchial cyst
a cyst formed deep within the neck from an incompletely closed branchial cleft, usually located between the second and third branchial arches. The branchial arches develop during early embryonic life and are separated by four clefts. As the fetus develops, these arches grow to form structures within the head and neck. Two of the arches grow together and enclose the cervical sinus, a cavity in the neck. A branchial cyst may develop within the cervical sinus. Called also branchiogenic or branchiogenous cyst. Seen rarely in dogs as a slowly developing swelling in the pharyngeal area, filled with saliva.
branchial groove
an external furrow lined with ectoderm, occurring in the embryo between two branchial arches.
References in periodicals archive ?
3,4) In 1997, Vieille-Grosjean et al showed for the first time that at 4 weeks of development, human branchial arches express the paralogous groups using the mouse homologues of HOXB1, HOXA2, HOXB2, HOXA3, HOXB3, HOXD3, HOXB4, and HOXC4 as probes for in situ hybridization.
It appears' to occur as a result of a failure of fusion of the paired second branchial arches in the midline during embryogenesis.
The relevance of these anatomic details to our discussion of the facial nerve is that the muscles associated with the branchial arches and jaws are innervated by a special set of visceral motor components of the cranial nerves.
Aberrant internal carotid arteries are caused by an embryogenic malformation of the first and second branchial arches.