Respiratory system

What are tiny air sacs which oxygen and carbon dioxide are exchanged?

The trachea is a passageway for air between the larynx and what other part of the respiratory system?

What are the smallest branches of the bronchial tree?

How many lobes does the right lung have?

How many lobes does the left lung have?

What encloses the lungs?

Which nerves in the upper part of the nasal cavity are concerned with the sense of smell?

What is the trachea lined with?

What are the two layers of the pleura called?

What 2 things help accomplish breathing?