pharynx
the nasal passage
It goes into small alveoles, and then into the blood stream. It will then go to the heart that will push the oxygen into the rest of the body trough the aorta and arteries.
Through the mouth via the trachea.
In through the nose and mouth along the trachea into the lungs. Then out again.
trachea sends dioxygen molecules to the lungs and blood carries it to muscles.
Trachea (or wind-pipe) to bronchi to alveoli of lungs ... and then back out.
oxygen enters the body when you breathe entering through the nose or the mouth. the red blood cells carry oxygen throughout the entire body.
After the mouth (or nose), oxygen (as part of the air) goes down your trachea, into the bronchi, and through the bronchioli, into the alveoli, where it enters the blood and gets taken via the blood to the various parts of your body.
The trachea is a normal part of the body and typically stays with you through your whole life.
magic school bus
It comes through your nose and into your lungs through the trachea.
Your trachea, or windpipe, allows air to come into your body and through your lungs. If food gets trapped inside your trachea, you cannot breathe.