Chemical messengers used to communicate between organs and tissues for bodily function are called

The chemical messengers used to communicate between organs and tissues for bodily function are called Hormones. The endocrine system is primarily composed of glands that produce chemical messengers called hormones. Glands of the endocrine system include the pituitary gland, the thyroid gland and the thymus. The endocrine system secretes hormones into the circulating blood to distant sites in the body.