This the respiratory system!
The major organ of the respiratory system is the lungs, and in the lungs the air gets divided among smaller and smaller tubes at the end of which the oxygen enters and carbon dioxide leaves the blood!
" You Should go home, lay in bed, and try to block everything out while trying to sleep"
Answer:
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<span><em>They tell us how life evolved and adapted to different environments and global changes throughout the Earth's development</em>
<em> Hope this helps:)</em>
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Explanation:
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