Examlex
The ________ theory describes how the solar system formed from a huge cloud of gases and small particles produced by an exploding, high-density star.
Posterior Air SACs
Posterior air sacs are part of a bird's respiratory system, acting as reservoirs for fresh air, allowing for efficient gas exchange.
Fresh Air
Air that is outdoor, unpolluted, and considered healthy to breathe, characterized by its cleanliness and freshness.
Inhalation
The act of drawing air or other substances into the lungs.
Exhalation
The process of breathing out, expelling air rich in carbon dioxide from the lungs to the outside environment.
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