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When you inhale and exhale, what takes place is the exchange of gases that occur mainly it the alveoli. That process is commonly called the respiration. 
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its copied i saw that from the searching websites like google
Its just a simple explanation really..
Copied? Really? Ohh, we, my group answered it inside our classroom. We just searched it at our Science book.
Respiration occurs while we breathe...When you inhale,you take in oxygen and travels through the alveoli of your lungs and exchange it with the carbon dioxide in your body and you exhale that carbon dioxide out..
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