Called the master gland, the Pituitary Gland secretes hormones that control the activity of other Endocrine Organs/Glands and regulate various biological processes. It's secretions include:

* Growth Hormone or (GH), which stimulates cellular activity in bone, cartilage, and other structural tissue.
* Thyroid Stimulating Hormone (TSH), which causes the thyroid to release metabolism-regulating hormones.
* Antidiuretic Hormone (AH), which causes the kidney to excrete less water in the urine.
* Prolactin, which stimulates milk production and breast development in females.

The Pituitary Gland is influenced both neurally and hormonally by the Hypothalamus.