The pituitary gland, or hypophysis, is an endocrine gland about the size of a pea and weighing 0.5 grams. As it is a very small part of the brain the question often arises as to where is the pituitary gland? Well the answer is quite simple this small but amazing structure is a protrusion off the bottom of the hypothalamus at the base of the brain, and rests in a small, bony cavity (sella turcica) covered by a dural fold (diaphragma sellae). The pituitary fossa, in which the pituitary gland sits, is situated in the sphenoid bone in the middle cranial fossa at the base of the brain. The pituitary gland secretes nine hormones that regulate homeostasis.
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