The hypophyseal portal system is the system of blood vessels that links the hypothalamus and the anterior pituitary (also called the adenohypophysis.

It allows endocrine communication between the two structures. The anterior pituitary recives releasing and inhibitory hormones in the blood. Using these the anterior pituitary is able to fulfill its function of regulating the other endocrine glands.

It is one of only a few portal systems of circulation in the body; that is, it involves two capillary beds connected by venules rather than arterioles.

Central nervous system | Cardiovascular system