Question

You are a little molecule of oxygen, floating in the air. Suddenly you feel a whoosh, and you are in this dark tube with little hairs tickling you.

Is this that thing called the nose?
Trace your journey from there to the alveoli of the lung; you will recognize it when you get there. It looks like a bunch of grapes.
Name the structures along the way.

Answer 1

When the air is inhaled via the nose, it will go into the nasal passage, through the sinuses. It will then travel down the larynx to the trachea into the main bronchi and it will bifurcate into the left and right main stem bronchus. After that it will pass through the smaller branches of the bronchioles. Through there it will pass to the alveoli; which is the "bunch of grapes".