Location: Outside U.S.
Country: New Zealand
Date: Summer 2012
How can whales hold their breath for longer? That is, what adaptations they have. This is about the sperm whale in particular.
One adaptation in particular is that sperm whales have very high levels of the oxygen-storage protein myoglobin in their muscles.
Richard E. Barrans Jr., Ph.D., M.Ed.
Department of Physics and Astronomy
University of Wyoming
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Update: November 2011