When a person sees a doctor about a respiratory illness, the doctor will want to determine if the sickness is in the upper respiratory tract or the lower respiratory tract. the starting point for the lower respiratory system is the trachea. which structures are part of the upper respiratory system? check all that apply.

1. the larynx
2. the bronchus
3. the alveoli
4. the lungs
5. the pharynx
6. the nose