This unit covers the make-up of the respiratory tract and its associated common diseases.

Instructions for this Lesson:
1. Download the Study Guide (PDF) for this unit.
2. Make notes as you are reading through the material.
3. Complete the assessments (below) before continuing to Module 3, Unit 4 – Skin.

Books required for this lesson:
Your chosen physiology textbook – study the chapter on respiration and the lungs.