QS Study

The pituitary gland is a part of our endocrine system. Its major purpose is to emit hormones into your bloodstream. It controls several other hormone glands in our body, including the thyroid and adrenals, the ovaries and testicles. It secretes hormones that control the actions of other endocrine organs and various tissues around the body.

Location of the pituitary gland

The pituitary gland lies in the hypophyseal fossa which is in the base of the skull. The fossa is roofed by the diaphragm sellae. The stalk of the pituitary gland is attached above to the floor of the 3rd ventricle. It’s located behind your nose, near the underside of our brain. It’s attached to the hypothalamus by a stalklike structure.

Blood supply of pituitary gland – It has a rich blood supply, with both a portal circulation (to the anterior pituitary) and arterial supply (to the posterior pituitary and pituitary stalk).

Arterial supply: It is supplied by the following branches of the internal carotid artery:

  1. One superior hypophyseal artery on each side.
  2. One inferior hypophyseal artery on each side.

Pituitary Gland 1

Fig- Blood supply of pituitary gland

Venous drainage

Venous blood drains into the nearby cavernous and intercavernous sinuses. Short veins emerge on the surface of the gland and drain into neighboring dural venous sinuses. The hormones pass out of the gland through the venous blood and are carried to their target cells.

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