The endocrine system is a network of glands in the body that produce and secrete hormones to regulate various bodily functions such as metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood.
A group of cells that produces and secretes chemicals. A gland selects and removes materials from the blood, processes them, and secretes the finished chemical product for use somewhere in the body.
Chemical messengers produced by glands in the endocrine system that are secreted directly into the bloodstream where they travel to tissues or organs all over your body.