In animals and humans, chemical coordination takes place with the help of hormones. Hormones are chemicals that help the body’s functions. Various glands in the body secrete hormones from time to time. Endocrine glands and the Exocrine glands are two types of glands that secrete various chemicals into the body. The exocrine glands release their chemicals in the ducts, these chemicals help in the digestion of food. The endocrine glands release hormones that help the body perform certain functions. For instance, the pituitary gland secretes growth hormone that helps the body grow.