branchial arches

branchial arches
paired arched columns that bear the gills in lower aquatic vertebrates and that, in the embryos of higher vertebrates, appear in comparable form before subsequent modification into structures of the head and neck. Each one contains a cartilaginous bar, consisting of right and left halves. In humans these are called pharyngeal arches because gills do not develop.

Medical dictionary. 2011.

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  • Branchial arches — Branchial Bran chi*al, a. (Anat.) Of or pertaining to branchi[ae] or gills. [1913 Webster] {Branchial arches}, the bony or cartilaginous arches which support the gills on each side of the throat of fishes and amphibians. See Illustration in… …   The Collaborative International Dictionary of English

  • Branchial — Bran chi*al, a. (Anat.) Of or pertaining to branchi[ae] or gills. [1913 Webster] {Branchial arches}, the bony or cartilaginous arches which support the gills on each side of the throat of fishes and amphibians. See Illustration in Appendix.… …   The Collaborative International Dictionary of English

  • Branchial clefts — Branchial Bran chi*al, a. (Anat.) Of or pertaining to branchi[ae] or gills. [1913 Webster] {Branchial arches}, the bony or cartilaginous arches which support the gills on each side of the throat of fishes and amphibians. See Illustration in… …   The Collaborative International Dictionary of English

  • branchial cleft — n one of the open or potentially open clefts that occur on each side of the neck region of a vertebrate embryo between the branchial arches, are formed by the meeting of an external furrow in the ectoderm with a pharyngeal pouch, may or may not… …   Medical dictionary

  • branchial cleft — noun one of a series of slit openings in the pharynxes of fishes and aquatic amphibians through which water passes • Syn: ↑gill slit, ↑gill cleft • Hypernyms: ↑structure, ↑anatomical structure, ↑complex body part, ↑bodily structure, ↑ …   Useful english dictionary

  • branchial arch — 1. Zool. one of a series of bony or cartilaginous arches on each side of the pharynx that support the gills of fishes and aquatic amphibians; gill bar. 2. Embryol. one of a series of archlike mesodermal thickenings of the body wall in the… …   Universalium

  • branchial groove — Embryol. one of a series of rudimentary depressions on the surface of the embryo between adjacent branchial arches, homologous to the branchial clefts of gill breathing ancestral forms. Also called visceral groove. * * * …   Universalium

  • branchial groove — Embryol. one of a series of rudimentary depressions on the surface of the embryo between adjacent branchial arches, homologous to the branchial clefts of gill breathing ancestral forms. Also called visceral groove …   Useful english dictionary

  • branchial region — the area were the branchial arches and gills develop …   Dictionary of ichthyology

  • branchial cleft — Zool. one of a series of slitlike openings in the walls of the pharynx between the branchial arches of fishes and aquatic amphibians through which water passes from the pharynx to the exterior. Also called visceral cleft. * * * …   Universalium

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