This module on the respiratory 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, four sections (information sheets) with their goals (e.g., identify organs and/or structures related to the lungs), optional activities (e.g., discuss how cigarette smoking affects the structures and function of the lungs), and posttests, and a glossary of terms. Topics covered in the unit are introduction to the respiratory system, the upper respiratory tract, the lungs, and respiration. An accompanying instructor's guide contains suggestions for using the module and answers to the posttest. (KC)