What are the many little branches of the respiratory system?

Bronchioles

air enters the respiratory system through the nose and mouth hope that helps :D

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.

To wear the full equipment.