It helps clean up all the type of "bad guys" i would call it, if you didnt have the liver, well then.... you'll fine out ;)
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I am not too for sure about W since I haven’t done earth science in a while but I hope I helped
A hydrometer<span> or areometer is an instrument that measures the specific gravity (relative density) of liquids—the ratio of the density of the liquid to the density of water. A </span>hydrometer<span> is usually made of glass, and consists of a cylindrical stem and a bulb weighted with mercury or lead shot to make it float upright.</span>
Hi.........................bye....................