A Frog Can Absorb Oxygen Through Its Skin and Lungs

question 83

Multiple Choice

A frog can absorb oxygen through its skin and lungs.Which is an advantage of absorbing oxygen through the lungs?

• A) The heart pumps oxygen from the lungs into the bloodstream.
• B) Oxygen absorbed in the lungs enters the blood stream.
• C) Air in the lungs has a higher concentration of oxygen than air in the atmosphere.
• D) Oxygen diffuses across cells more slowly than across the lining of the lungs.
• E) Lungs have more surface area than the skin.

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