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The 02 comes in through the nose and to the trachea, then to lungs. There are 600 million alveoli. The diaphragm is a muscle under your lungs. The bronchioles are the two things that connect to the wind pipe.

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I learned that we inhale oxygen and exhale out carbon dioxide, through our nose. The air gets to the lungs by going in the wind pipe or also known as the trachea. In the lungs there are bronchia, alveoli and capillaries.
The lungs has a lot of oxygen.

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O2 comes in and CO2 goes out.
The wind pipe is also called the trachea. The trachea is where the O2 comes in and where the CO2 comes out. At the bottom of your lungs is your diaphragm. The wind pipe is also where the O2 comes in and the CO2 goes out.

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I learned that lungs have a lot of O2 in them. It is in the Respiratory system. It is made up of the trachea, lungs, and diaphragm.  I also learned that air goes into the lungs and carbon dioxide goes out.  When you inhale, your lungs inflate, and when you exhale your lungs deflate. Bye!

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The lungs have a whole bunch of O2 in them. You inhale O2 and exhale carbon dioxide. The lungs are a part of the respiratory system. The diaphragm is under your lungs. When you exhale your lungs deflate. There are a lot of bronchiole's in the lungs.

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I learned about the O2 system and CO2 system.  The oxygen goes into the lungs.  You breath out Carbon dioxide.  There is 600,000,000 Alveoli.

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The lungs fill up with air and inflate and deflate when you breathe out and when you sing.

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Lungs by Lydia Cole
Lungs are very important because they are what let you breath!! They also have a lot of 02 in them.

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The lungs are part of the respiratory system. O2 enters and CO2 exits.

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Your lungs inflate when you breath in and deflate when you breath out. We need to breath to live. Air is also called O2.

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What I learned about the lungs that it has a lot of O2 in it. It is part of the Respiratory system. It is made with the Trachea, Windpipe, and Diaphragm.

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The lungs are part of the Respiratory system. Without it, you could not breathe. The reason why that is bad is if the Circulatory system could not send O2, oxygen, around the body you would die and you could not get rid or CO2,  Carbon dioxide.

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When you breathe your o2 come in and co2 comes out.

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The respiratory system is the most important system in my body.

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You breath in O2 and let out CO2. The lungs are part of the Respiratory system. The diaphragm is under the lungs.