Filtration. The process whereby some substances, but not all, pass through a filter. In a kidney, blood pressure forces materials through the filter(glomerulus) Blood passes thru the many glomeruli and the thin walls of the glomerulus (the filter) permits water, salts, sugar and urea to leave the blood stream.
Confidence votes 319K. The lead singer of the ban Evanescence is Amy Lee. Amy Lee has been the front woman of the band since the beginning and has helped lead the band to great success.
This article is about the Iron Maiden singer. For the fictional music producer, see More cowbell. Paul Bruce Dickinson (born 7 August 1958), known professionally as Bruce Dickinson, is an English singer, songwriter, musician, airline pilot, author and broadcaster. He is the lead singer of the heavy metal band Iron Maiden and is renowned for his wide-ranging operatic vocal style and energetic stage presence.