Question

state the role of the following in human respiratory system
1. nasal hair
2. diaphragm
3. alveoli
4. nasal cavity​

Answer 1

1. Traps dust particles , Lines the nasal cavity and prevents small particles entering the nasal tract

2.Helps in exhalation and inhalation by rising up and down

3. Little air sacs that act as the site of diffusion , Very rich in blood vessels


4. It is through the nasal cavity that air travels into the nasal tract and trachea