How salty is salt water?

Salinity is the way we gauge how much salt there is in water. Some salt water environments, also called marine, have more or less salt in them. Salt water is less prone to freeze than water that has little or no salt in it. All water has some form of salinity in it, even fresh water. Water coming down out of the mountains gathers up minerals and salt as it travels down stream.

The human body also contains salt water. We sweat and cry salt water. Salt water AKA saline solution is what is used to replace our body fluids in hospitals. Salt water is also used to as an eczema treatment and to treat damaged skin. But how does salt water in a marine environment compare to the saline in the human body? The world's oceans range from 3.1% to 3.8% salinity. The human body is around 0.9% so the world's oceans contain 3 times the amount of salt as our bodies do.