<span>Air is breathed in, it goes through the pharynx (if you are breathing through your nose), down the trachea (lung pipe), and into the lungs. Air is breathed in, it goes through the pharynx (if you are breathing through your nose), down the trachea (lung pipe), and into the lungs.
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In 1665, Robert Hooke observed D. Cell Walls through a microscope!
Answer:
d)organism,system,organ, tissue is from smallest to largest