You need to get oxygen from the air into your bloodstream so that it can get into your cells for respiration. you also need to get rid of carbon dioxide in your blood. This all happens inside the LUNGS . breathing is how the air gets in and out of your lungs.
The LUNGS are in the Thorax:
The thorax i seperated from the lower part of the body by the diapraghm.
The lungs are protected by he ribcage.
The aire you breath goes to the trachea this splits in to tw tubes , the bronchi, each going to one lung each.
The bronchi spilt progressively in to smaller tubes called the bronchioles.
The bronchioles end at small bags called alveoli where the gas exchange takes place.l
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