The anterior pituitary (adenohypophysis) is a classical gland composed
predominantly of cells that secrete protein hormones.
The posterior pituitary (neurohypophysis) is in reality an extension of
the hypothalamus. It is composed of axons from the hypothalamus which
extend downward behind the anterior pituitary. It also forms the so-called
pituitary stalk, which appears to suspend the anterior gland from the