A video that describes the endocrine system and how it relates to homeostasis and hormones like insulin. Produced by Project NEURON at the University of Illinois at Urbana-Champaign. To download this video and access free educational materials, please visit neuron.illinois.edu/ This project was supported by the National Center for Research Resources and the Division of Program Coordination, Planning, and Strategic Initiatives of the National Institutes of Health through Grant Number R25 RR024251-03. The opinions expressed in these videos are not the funding agency's.