i) Endocrine system is formed of all endocrine gland of the body through different endocrine glands are different in embryonic origin and isolated from one another but these interact with one another collectively to form an endocrine system
ii) This along with the Nervous system controls in co-ordinate the body function and maintains a homeostasis that is a normal condition for a body to survive collectively form the neuroendocrine system and thus control and govern the body