Explain how a diving marine mammal increases its supply of stored O2, in spite of the fact that its lungs are

collapsed at depths below 25 meters.



What will be an ideal response?


ANSWER: Marine mammals increase their stores of O2 by: (1) increasing size-relative blood volume,
(2) increasing erythrocyte concentrations, and (3) increasing myoglobin concentrations in
the muscles.

Biology & Microbiology

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