Tags: Anatomical Structure, Embryology.

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

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