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MohamadMatar MohamadMatar
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6 years ago
Respiration in birds differs from mammals in that birds have
 a. lungs used for gas exchange only.
  b. a comparatively higher tracheal volume.
  c. air capillaries.
  d. air sacs for ventilation.
  e. all of these.
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miguelhdz8miguelhdz8
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6 years ago
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