The<unk>  or gland is a small organ found in the neck region of many animals.
In humans, the<unk>  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)
Ultimobranchial body
Filum terminale
Cutaneos Horn
Os odontoideum
Juxtarestiform body
Mastoid process
Ranula
Veratrum