Friday, May 29, 2009

Investigating the Many Ways Your Body Uses Water

Water is a solvent. It dissolves other substances and carries nutrients and
other material (such as blood cells) around the body, making it possible for
every organ to do its job. You need water to
  • Digest food, dissolving nutrients so that they can pass through the intestinal cell walls into your bloodstream, and move food along throughyour intestinal tract
  • Carry waste products out of your body
  • Provide a medium in which biochemical reactions such as metabolism (digesting food, producing energy, and building tissue) occur
  • Send electrical messages between cells so that your muscles can move, your eyes can see, your brain can think, and so on
  • Regulate body temperature — cooling your body with moisture (perspiration) that evaporates on your skin
  • Lubricate your moving parts

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