Ultimopharyngeal body

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Ultimobranchial body
Latin corpus ultimopharyngeum
Precursor fourth pharyngeal pouch
Gives rise to parafollicular cells
MeSH A13.939
Code TE E5.
Anatomical terminology

The ultimopharyngeal body or ultimobranchial body or ultimobranchial 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 C cells—of the thyroid gland. In humans, this body is a derivative of the ventral recess of the fourth pharyngeal pouch,[1] technically fifth, but that one is rudimentary and merges with the fourth.


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