IB Biology: gas exchange
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5 Terms
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gas exchange
the diffusion of oxygen and carbon dioxide to and from the blood at the alveoli and the respiring tissues
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ventilation
movement of air in and out of the lungs in two stages; inspiration and expiration; controlled by the movement of the diaphragm and ribcage
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Terrestrial organisms exchange gases with…
the air
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property of gas exhange surfaces
permeable
large => SA to volume ratio
moist : allows gases to dissolve
thin: gases must only diffuse a short surface
concentration gradient
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adaptations in a
Note 
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