Posts tagged ‘Moisture’

Do fish drink the water they live in?

Fish

Fish consume the water they inhabit if it agrees with their system.  Since the bodies of freshwater fish are much saltier than the water they live in, they don’t drink.

They are in danger of too much water entering their bodies, diluting their body fluids. They urinate often to get rid of any extra water that soaks into their bodies.

Saltwater fish, however, drink large amounts of water, since the salty sea water absorbs moisture from their bodies, causing dehydration.  These fish eliminate excess salt through their gills and very concentrated urine.–Dick Rogers

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Why do dogs pant?

Dogs pant to cool off when they are feeling hot.  When our body temperature gets too high, we sweat.  Evaporation of sweat from the skin takes up a lot of heat, and helps cool the body.  But dogs are almost completely covered with hair, and have every few sweat glands.

They can’t keep cool by sweating.  Instead, a dog pants.  It sticks out its tongue and breathes rapidly.  By panting, a dog moves air back and forth over the moist tissues of its mouth and tongue.  As the moisture evaporates, body heat is carried away, and the dog feels cooler.–Dick Rogers