Abstract
The endocrine system regulates the homeostasis of the human body through small molecules named “hormones”. For appropriate function of the endocrine system, the following regulatory mechanisms should function properly: appropriate production and secretion of hormones, transport of hormones through the blood stream, sensing of hormones and exertion of physiologic effects in target organs, and hormone metabolism. To better understand the physiopathology of endocrine tumors, this review describes the basic features of the endocrine system.
