ultimobranchial body(redirected from Ultimo-branchial bodies)
Also found in: Encyclopedia.
One of two embryonic pharyngeal pouches usually considered as rudimentary fifth pouches. They become separated from the pharynx and incorporated into the thyroid gland, where they give rise to parafollicular cells that secrete calcitonin, a hormone that lowers the blood calcium level.
See also: body
Medical Dictionary, © 2009 Farlex and Partners