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Why should the increased affinity of crocodile hemoglobin for bicarbonate ion allow the crocodile to hold its breath for long periods of time?
Wiki User
∙ 11y ago
Like most systems in the body (any body) the oxygen delivery system doesn't work at 100% efficiency - it's just good enough to keep us going. The blood returning to the heart and lungs hasn't given up all the oxygen it carries, just some of it. In crocodiles, as more bicarbonate ions attach to the hemoglobin cell, it loosens the hold on the remaining oxygen, allowing it to be released to be used by the body. So the crocodile hemoglobin/oxygen system is more efficient than a human's, and that lets them go longer without breathing, if they have to.
Wiki User
∙ 11y ago
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