Welcome to the module on the Respiratory System. 

At the end of this module you should: 
1. Know all the parts of the respiratory system and their functions. 
2. Know where in the body the lungs are located and what protects them. 
3. Know what gases are exchanged in the lungs and how this occurs. 
4. Understand how we breathe in and out.
5. Understand the factors that affect the respiratory system.