Endocrine system is an important system in the human body. It cooperates with the nervous system and they control the growth of human body and metabolism of the body. It affects your action and reproduction.

It is formed by 27 glands which includes thyroid, parathyroid, adrenal, pituitary, pineal gland, pancreatic islets, thymus, and gonad. These are 8 main glands in the endocrine system.