The
pituitary gland is also known as hypophysis.
It is small gland
with a diameter of 1 cm and weight of 0.5-1 gm.
It lies at the base of the brain in sella
tunica. It is connected with the
hypothalamus by the pituitary stalk or
hypophyseal stalk.
The pituitary gland is divided into two
portions:
(1)Anterior pituitary or adenohypophysis
(2)Posterior pituitary or neurohypophysis.
Between the two portions, there
is a small, relatively avascular zone called pars intermedia. It forms a part of
anterior pituitary.It is very small in human beings and is larger and more
functional in some lower animals.
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