In this video resource students will learn about internal respiration and external respiration. With clear explanations and graphics, students will see that internal respiration is the exchange of oxygen and carbon dioxide between the blood and the cells of the body (other than the lungs), and that external respiration is the exchange of gases between the air and blood in the lungs. The video resource details the anatomy involved in breathing, and goes on to look at what causes snoring and sleep apnoea.