What is breathing in also known as ?

What is breathing out also known as ?

The lungs contain many air sacs , what are they called ?

How are alveoli adapted to allow for gas exchange ?

describe the percentages of the different gasses before we breath air in?

describe the percentages of the different gasses after we breath out

explain why the composition of gases are different before and after we breath ?

What is the trachea ?

What is the bronchus ?

What are the bronchioles ?

what is the diaphragm ?