Pituitary gland. Illustration of a section through the pituitary gland. Also shown is part of the hypothalamus (across top in the brain) and the blood supply (red and blue vessels) and nerve supply (green) to the gland. The site of the pituitary gland is known as the sella turcica, with the gland partially enclosed by the sphenoid bone (blue). The pituitary gland (hypophysis) is located at the base of the brain behind the eyes. It is a key gland that regulates many metabolic processes.