Larger mammals need more oxygen than smaller mammals, but they need less oxygen per gram of body weight. Smaller mammals meet their need for more oxygen with a _______ mass-specific heart size and a _______ heart rate.

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The Answer of Larger mammals need more oxygen than smaller mammals, but they need less oxygen per gram of body weight. Smaller mammals meet their need for more oxygen with a _______ mass-specific heart size and a _______ heart rate.

Larger Mammals Need More Oxygen Than Smaller Mammals, but They