High resolution

Module 10: Figure hypothalamic pituitary regulation

The hypothalamic pituitary regulatory system.

Neurons located within the hypothalamus synthesize a number of factors, which are released into the hypophyseal portal circulation at the median eminence and travel down to the anterior pituitary. The latter has endocrine cells, which respond to the factors by releasing a range of hormones, and folliculostellate (FS) cells that form a network that surrounds the endocrine cells. Further details of anterior pituitary structure are shown in Module 10: Figure anterior pituitary structure. A separate group of neurons synthesize vasopressin or oxytocin that is then released into the circulation at the posterior pituitary.