Pituitary Gland

Pituitary Gland The structure indicated is the pituitary gland. The pituitary gland is an endocrine gland located at the base of the brain, and lies within the sella turcica of the sphenoid bone, which is a saddle-shaped depression that encases and surrounds the pituitary gland­. The deepest part of the sella turcica is known as the hypophyseal fossa, anteriorly is the tuberculum sellae, and posteriorly is the dorsum sellae. The sella turcica itself is covered by a fold of dura known as the diaphragma sellae. The pituitary gland releases several hormones which are responsible for the control and regulation of …

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Isthmus of Thyroid Gland

Isthmus of Thyroid Gland The structure indicated is the isthmus of the thyroid gland. The thyroid gland sits anteriorly in the neck, just inferior to the thyroid cartilage. It is located deep to the overlying strap muscles (sternohyoid, sternothyroid and omohyoid). It has two lateral lobes connected in the centre by the isthmus. The isthmus lies over the 2nd and 3rd rings of the trachea The lateral lobes extend from the lateral aspects of the thyroid cartilage down as far the 6th ring of the trachea. Occasionally a pyramidal lobe is present, which is an upward extension of the isthmus, …

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Isthmus of Thyroid Gland