Answer:
Endocrine system which is formed of all endocrine glands of body which along with nervous system of body, controls and coordinates the body functions and maintains a homestasis inside the body. Thoughs different endocrine glands are different in embroynic origin and are isolated from one another but these interact with one another so collectively form an endocrine system. The secreation of endocrine glands are known as hormones like insulin which control blood sugar level.
The endocrine system is instrumental in regulating metabolism, growth, development and puberty, tissue function, and also plays a part in determining mood.
The field of medicine that deals with disorders of endocrine glands is endocrinology, a branch of the wider field of internal medicine.