Ultimobranchial body
Precursor	fourth pharyngeal pouch
Gives rise to	parafollicular cells
MeSH	Ultimobranchial+body

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^[1] (or fifth)^[2]

[edit] References

[edit] External links

• ent/534 at eMedicine
• hednk-022 — Embryology at UNC

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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

v • d • e Human development of head and neck / branchial apparatus (GA 1.65) Nose Nasal placode · Olfactory pit · nasal prominences (Lateral, Medial) · Intermaxillary segment Mouth/neck Palate Primitive palate · Secondary palate 1st arch Frontonasal prominence · Maxillary prominence · Mandibular prominence (Meckel's cartilage) Anterior tongue: Lateral lingual swelling · Tuberculum impar Thyroid (pouches 3-5) Thyroid diverticulum · Thyroglossal duct · Ultimobranchial body General Pharyngeal groove (Cervical sinus) · Pharyngeal arch (1st, 2nd) · Pharyngeal pouch (Ultimobranchial body) respiratory system navs: anat nose,larynx/lower+thoracic cavity/physio/dev, noncongen/congen/tumors, symptoms+signs/eponymous, proc mouth navs: anat/dev, noncongen/congen face/congen GI/neoplasia, symptoms, proc endocrine navs: anat/physio/dev/hormones, noncongen/congen/neoplasia, symptoms+signs/eponymous, proc