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The X- and Y-axes of the Cartesian coordinate system divides the system into four separate regions called ____.
Internal Respiration
The exchange of gases (oxygen and carbon dioxide) between the blood and the body cells.
Alveoli
Microscopic air sacs in the lung.
Carbon Dioxide
A colorless, odorless gas produced by burning carbon and organic compounds and by respiration, essential for plant photosynthesis but a contributor to global warming when in excess.
Conchae
Curved bony projections inside the nasal cavity that help to filter, warm, and moisten air as it is inhaled.
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