Interface shows remnants of Rathke's pouch between pars nervosa and pars intermedia. Colloid of cysts was lost during tissue processing. Basophils adjacent to cysts are adrenocorticotropes. Thin, unmyelinated hypothalamic axons end in Herring bodies. Axons are unmyelinated and vary in size
Endocrine system regulates metabolism, growth, development and reproduction. Hormones are chemical messengers secreted by endocrine glands. Hormones travel through blood, paracrine and autocrine mechanisms. Receptors on target cells detect hormones and initiate reactions