How are whales and other marine mammals adapted to handle salt?

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Offline chris

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How do marine mammals like whales and dolphins cope without access to fresh water? They presumably ingest large amounts of salt in their diet, so how do they deal with this?
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Offline chris

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This answer was supplied for a listener to the podcast, although the physiology of the kidney is alluded to but not explained in detail:

http://www.thenakedscientists.com/HTML/questions/question/2379/
I never forget a face, but in your case I'll make an exception - Groucho Marx