1. Define the following terms

2. Where is the commonest cause of air way obstruction occur during anesthesia and what are the managements? 

3. What is the narrowest point of the air ways in adult and children? 

4. What are the mechanisms of respiration (from pulmonary ventilation to tissue oxygenation)? 

5. What is functional residual capacity? Describe its implication during induction of anesthesia?