PE Journey of Oxygen
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- The journey of oxygen is a complicated system which works simultaneously to keep us alive.
- Bronchioles
- Nose & mouth
- Lungs
- First, let's get familiar with the main names we need in our journey.
- Trachea
- Bronchi
- The first step of the oxygen journey is when the brain stem sends a message to the diaphragm telling it to contract downwards for inspiration.
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- As the diaphragm contracts, it allows for more room in the lungs for more air inhalation.
- Now that the lung has enlarged and is ready for more air, we breathe in through our nose and mouth where the oxygen enters.
- The cells continue along from the bronchi onto the bronchioles and end up at a tiny air sac called the alveoli.
- All the little oxygen cells then move into the trachea and split evenly into each bronchi.
- Inside these alveoli's, the oxygen diffuses into the capillaries and bloodstream while carbon dioxide diffuses into the alveoli.
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- The carbon dioxide undergoes the opposite of the oxygen journey and is exhaled through the mouth and nose.
- This journey is repeated over and over again and keeps us going every second of the day.
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