ABSTRACT
The endocrine system is very important in maintaining normal homeostasis, by interacting with the central and peripheral nervous systems and the immune system. The system can be considered as comprising two main parts:
● The classical endocrine system, consisting of the pituitary, thyroid, adrenal and parathyroid glands, the islets of Langerhans in the pancreas, and the endocrine cells of the testis and ovary. These secrete hormones into the bloodstream, and these interact with cells at distant sites.
