ultimobranchial bodies

ultimobranchial bodies
embryonic derivatives of the fourth pharyngeal pouches (sometimes described as a rudimentary fifth pouch); they migrate along with the parathyroid glands and are incorporated in the thyroid gland. In vertebrates other than mammals, these remain as discrete masses in the neck or mediastinum throughout adult life. The parafollicular cells of these bodies produce calcitonin. Called also postbranchial or telobranchial b's.

Medical dictionary. 2011.

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  • ultimobranchial — In embryology, relating to the caudal most pharyngeal pouch. [L. ultimus, last, + G. branchia, gills] * * * ul·ti·mo·bran·chi·al .əl tə mō braŋ kē əl adj being, relating to, produced by, or derived from the ultimobranchial bodies * * *… …   Medical dictionary

  • ultimobranchial gland — ▪ anatomy       in biology, any of the small bodies in the pharynx that develop behind the fifth pair of gill pouches in the vertebrate embryo. In mammals the ultimobranchial tissue has become incorporated into the parafollicular cells of the… …   Universalium

  • postbranchial bodies — ultimobranchial b s …   Medical dictionary

  • telobranchial bodies — telopharyngeal bodies ultimobranchial b s …   Medical dictionary

  • body — 1. The head, neck, trunk, and extremities. The human b., consisting of head (caput), neck (collum), trunk (truncus), and limbs (membra). 2. The material part of a human, as distinguished from the …   Medical dictionary

  • fish — fishless, adj. /fish/, n., pl. (esp. collectively) fish, (esp. referring to two or more kinds or species) fishes, v. n. 1. any of various cold blooded, aquatic vertebrates, having gills, commonly fins, and typically an elongated body covered with …   Universalium

  • Fish — /fish/, n. Hamilton, 1808 93, U.S. statesman: secretary of state 1869 77. * * * I Any of more than 24,000 species of cold blooded vertebrates found worldwide in fresh and salt water. Living species range from the primitive lampreys and hagfishes… …   Universalium

  • calcitonin — /kal si toh nin/, n. Biochem. a polypeptide hormone that participates in the regulation of calcium levels in vertebrates by inhibiting loss of calcium from bone to the blood. [1960 65; CALCI + TONE + IN2] * * * ▪ hormone also called… …   Universalium

  • Calcitonin — A hormone produced by the thyroid gland that lowers the levels of calcium and phosphate in the blood and promotes the formation of bone. Bone is in a constant state of remodeling whereby old bone is removed by cells called osteoclast and new bone …   Medical dictionary

  • Cranial neural crest — Latin crista neuralis cranialis Code TE E5. The cranial neural crest is a form of neural crest.[1] The cranial neural crest arises in the anterior and populates the face and the pharyngeal arches giving rise to bones, cartilage, n …   Wikipedia

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