Detailed animation identifies the endocrine glands and explains how they work together, often under the direction of the pituitary gland. Additional animation and live photography clarify the endocrine system's management of growth, metabolism and reproduction.  Informative discussions with an endocrinologist provide fascinating data on such modern issues as the use of growth hormones in children, hyper- and hypo-thyroid conditions and their treatments as well as the controversial use of steroids in sports training.