Ultimobranchial body

Ultimobranchial body

Infobox Embryology
Name = PAGENAME
Latin =
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Caption =


Caption2 =
System =
CarnegieStage =
Precursor = fourth pharyngeal pouch
GivesRiseTo = parafollicular cells
MeshName = Ultimobranchial+body
MeshNumber = A13.939
DorlandsPre = b_17
DorlandsSuf = 12191704
The ultimobranchial body or gland is a small organ found in the neck region of many animals.

In humans, the ultimobranchial body is an embryological structure that gives rise to the calcitonin-producing cells—also called parafollicular cells or clear cells—of the thyroid gland. In humans, this body is a derivative of the ventral recess of the fourth pharyngeal pouch (or fifth) [ [http://www.mc.vanderbilt.edu/histology/labmanual2002/labsection3/ThyroidParathyroidIslets03.htm Endocrine Glands ] ]

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As in Avian ultimobranchial glands they produce some hormones that influence other endocrine glands and others that act directly on target organs;Morning Star


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  • ultimobranchial body — n a hollow vesicle that is formed from the fourth pharyngeal pouch, may represent a fifth pharyngeal pouch, and gives rise to cells that produce calcitonin and later become incorporated into the thyroid gland in higher vertebrates or persist as… …   Medical dictionary

  • ultimobranchial body — noun : a hollow vesicle of the embryo believed to be derived from the fifth pharyngeal pouch …   Useful english dictionary

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  • bone — /bohn/, n., v., boned, boning, adv. n. 1. Anat., Zool. a. one of the structures composing the skeleton of a vertebrate. b. the hard connective tissue forming the substance of the skeleton of most vertebrates, composed of a collagen rich organic… …   Universalium

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  • Calcitonin — is a 32 amino acid linear polypeptide hormone that is produced in humans primarily by the parafollicular cells (also known as C cells) of the thyroid, and in many other animals in the ultimobranchial body.[1] It acts to reduce blood calcium… …   Wikipedia

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