The Countercurrent Heat Exchanger of Some Large, Rapidly Swimming "Hot

question 15

Multiple Choice

The countercurrent heat exchanger of some large, rapidly swimming "hot" fish,

• A) traps heat in the muscles.
• B) produces heat.
• C) cools the blood returning to the heart.
• D) lowers the internal body temperature to that of the surrounding water.
• E) cools the skin.

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