Major organs
Lungs- We breathe all the time in order to supply our body with oxygen and get rid of carbon dioxide. We use our lungs to do this. Air from our mouth and nose enters the windpipe and goes down the throat. Then it makes its way to the chest. It then splits into two passages. (One for each lung) Our lungs are full of tunnels that end in tiny air sacks called alveoli. This is where the exchange of oxygen and carbon dioxide takes place. After, oxygen passes into your blood and your blood carries the oxygen to every part of your body.
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Windpipe (Trachea)- The windpipe, also known as the trachea, takes the air from your mouth and nose into your lungs. It starts at your neck and then when it has reached the lungs, it divides into two bronchi. It also filters the air while it's in the windpipe. The average adult windpipe is about 12cm in length and 2cm in diameter.
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Blood Vessels- In our lungs, we have air sacs that are called alveoli. Blood vessels cover each alveoli that connect to a system of veins and arteries that move blood through our body. The oxygen then spreads into the blood vessels so that the heart can pump it to different parts of the body.
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