Re: Morphological evidence of marine adaptations in human kidneys

r norman:
>Mario Petrinovich:
>> Ok. Now, do you know, maybe, how animals that feed on shellfish
>>react?
>> Also, on what ways freshwater vertebrates lose salt, and on what
>>ways we are losing salt?
>> Then, what about fruits? Why we don't salt fruits? -- Mario
>>
>
> Marine shellfish have the same body fluids as sea water. Therefore,
> eating oysters and clams, or shrimp and lobsters, or octopus and squid
> produces the same salt/water problems as drinking sea water. A
> vertebrate gets an excess amount of salt in this food and insufficient
> water.

Insufficient water in food. But if it drinks a lot of fresh water?

> Freshwater fish lose large quantities of salt by diffusion through
> their gills. Freshwater amphibians lose large quantities of salt by
> diffusion through their permeable skin. Freshwater reptiles, birds,
> and mammals have relatively impermeable skin and no gills so they
> don't lose salt that way. Still there is necessarily some salt lost
> in their urine and their feces and in any other bodily secretions.That
> salt must be made up in their food. Carnivores get a fair amount of
> salt from the body fluids of their prey. Herbivores get virtually
> none in their food. Hence herbivores in particular tend to be
> attracted to mineral salt deposits.

Weren't we suppose to be meat eaters? We are salting meat, too.

> You have already been told: many people do salt fruits.

I asked question, what fruits that eat Old World monkeys do we salt?
Can you give me an answer? -- Mario


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