In severe cases, the viral infection causes a high fever, bleeding into the skin, and necrosis (death) of cells in the kidney and liver. The damage done to the liver from the virus results in severe jaundice which yellows the skin. Hence, the yellow in yellow fever..
filter definition: The definition of a filter is something that separates solids from liquids, or eliminates impurities, or allows only certain things to pass through. (noun) A Brita that you attach to your water faucet to remove impurities from you...
Filtration is the process where a filter paper and funnel is used. It is used to separate the liquid from the solid(s), mostly suspensions. The residue is then collected on the filter paper. A separating funnel is used when there are two liquids and one is denser than the other.