Much like the nervous system the endocrine system relays importantcommunication signals throughout the body. The endocrine system uses chemicalsignals known as ... » 

Much like the nervous system the endocrine system relays importantcommunication signals throughout the body. The endocrine system uses chemicalsignals known as hormones which are produced and stored in special glands inthe body. This title helps you learn how this chemical messaging system isvital to the bodys growth and metabolism. «