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Parathyroid Glands - Anatomy & Physiology (view source)
Revision as of 17:10, 6 January 2011
, 17:10, 6 January 2011→Embryology
The parathyroid glands are multiple (generally four) small glands, approximately 1-2mm in length are located about the cranial trachea. Generally, there are two internal glands embedded within the [[Thyroid Gland - Anatomy & Physiology|thyroid Glands]], and two external glands are outside the thyroid tissue. However, all of the parathyroid tissue may be embedded within the thyroid gland itself. In the Horse, there are 'nests' of parathyroid tissue along the neck to the thoracic inlet.
The parathyroid glands are multiple (generally four) small glands, approximately 1-2mm in length are located about the cranial trachea. Generally, there are two internal glands embedded within the [[Thyroid Gland - Anatomy & Physiology|thyroid Glands]], and two external glands are outside the thyroid tissue. However, all of the parathyroid tissue may be embedded within the thyroid gland itself. In the Horse, there are 'nests' of parathyroid tissue along the neck to the thoracic inlet.
==Embryology==
The parathyroid glands originate from the endoderm of pharyngeal pouches III and IV. The internal gland from pouch IV and the external from pouch III.
The parathyroid glands originate from the endoderm of pharyngeal pouches III and IV. The internal gland from pouch IV and the external from pouch III.