This module on the endocrine system is one of 17 modules designed for individualized instruction in health occupations education programs at both the secondary and postsecondary levels. It is part of an eight-unit miniseries on anatomy and physiology within the series of 17 modules. Following a preface which explains to the student how to use the module, the unit consists of a pretest with answers, six sections (information sheets) with their objectives (e.g., describe the basic functions of hormones and how their secretion is controlled), optional activities (e.g., find out the causes and effects of Addison's disease and Cushing's syndrome), and posttests, and a glossary of terms. Topics covered in the unit are introduction to the endocrine system, the pituitary gland, the thyroid and parathyroid glands, the adrenal glands, the pancreas, and the gonads. An accompanying instructor's guide contains suggestions for using the module and answers to the posttest. (KC)