Answer:
Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls - allow gases to pass through. Extensive blood supply - ensuring oxygen rich blood is taken away from the lungs and carbon dioxide rich blood is taken to the lungs.
Answer:
Carbohydrates. Depending on the carbon-based molecule broken down, the amount of ATP produced will be less or more.
Explanation:
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