The Path of Oxygen in Our Body. Hello! I’m your guide through your Respiratory System! My name is, “Mr. Oxygen Molecule,” but you can call me, “Mr. O 2 .”. The Path of Oxygen in Our Body: The Story of Respiration. Ta ble of Contents Introduction Inhale Mouth and Nose Nasal Passage
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Hello! I’m your guide through your Respiratory System! My name is, “Mr. Oxygen Molecule,” but you can call me, “Mr. O2.”
When we inhale, we breathe in. There are two places that air (and the oxygen in it) can get into our body:
Warm, moist air enters the rest of our body easier than cold, dry air.
Tiny Dust Particles
You can feel the ridges on the front of your throat!
Before the air travels down the trachea
toward the lungs, it passes through the
Birds-eye view of the Epiglottis
The air moves down the trachea where it branches off into two tubes, each entering one of the lungs.
Mucus- in the bronchial tubes
Each Cilium acts like a tiny broom
Tiny hairs in the bronchial tubes
Germs and dust that get past the nasal passage stick to the mucus.
Sweeps back & forth 10 times/second!
That’s 36,000 times/hour!!
There are over 300,000,000 alveoli in each lung!
cover each alveoli.
Red Blood Cell
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Created by Cynthia Theorin
For the 4th Graders of
Gaylord A. Nelson Education Center