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Respiration (External Respiration (Water will either... (be exhaled in the…
Respiration
External Respiration
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Diffusion of oxygen into blood, and diffusion of carbon dioxide and water into the alveoli to be healed with air
Carbon dioxide diffuses from [H] to [L] down its concentration gradient, and moves into the alveoli be breathed out
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When blood returns to lungs, conditions change: Hemoglobin dumps carbon dioxide and hydrogen and wants to pick up oxygen
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Only water and carbon dioxide is left to be excreted. Carbon dioxide diffuses into alveoli and is exhaled
Water will either...
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- enter the alveoli to keep them moist
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Internal Respiration
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Diffusion of oxygen into the tissue cells, and the diffusion of carbon dioxide and water into blood capillaries
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At venule end of capillary bed, when water is drawn back into blood by osmotic pressure, carbon dioxide enters blood
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