Draw the outline of the head and neck
Sketch the nose and mouth
Draw the nasal cavity inside the nose
Add the pharynx behind the nose and mouth
Draw the larynx at the top of the windpipe
Sketch the trachea as a vertical tube down the neck
Split the trachea into two bronchi
Draw one bronchus going to each lung
Sketch the left lung
Sketch the right lung
Add smaller bronchi inside each lung
Draw bronchioles branching throughout both lungs
Add alveoli at the ends of the bronchioles
Draw the diaphragm below the lungs
Outline the chest cavity around the lungs
Label each main part of the respiratory system