@ellennicolecalunsag
Active 1 year, 10 months ago
The respiratory system is a complex city at work within our body, where its key elements are the air we breathe (oxygen) and our lungs. This system functions with our every breath— the intricacy of airways and pathways facilitating the exchange of gases that goes in and out of our body. It is designed for transport— for nutrients and waste pro […] View
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