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The Journey of An Oxygen Molecule
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The Journey of An Oxygen Molecule
Entering the body
The oxygen molecule enters the body when breathed in through the nose. The oxygen molecule then travels down the trachea (wind pipe) into the lungs.
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Caitlin Jennings
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Into the lungs
Entering the lungs
When the oxygen molecules enter the lungs, the molecules go to the bronchi. The oxygen causes the bronchi to expand. The oxygen then goes into the bronchioles, which are passages to the next place, the alveoli. The alveoli are air sacs within the lungs. The molecules are then transported to the capillaries, which are tiny, hair like structures.
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The exchange with carbon dioxide
The oxygen molecules are exchanged with carbon dioxide molecules in the alveoli. The alveoli act as a chamber for gasses to be exchanged. The carbon dioxide comes from the blood into the lungs and into the alveoli. The carbon dioxide and the oxygen join through cellular respirations and are separated by the person breathing in and out.