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.
Actually, Greg Rolie was the original lead singer of Journey. He is alive and well, entering the Rock and Roll Hall of Fame as a member of Santana. Robert Fleischman was the next lead singer, even Neal Schon sang some lead before Perry joined the band. The band was founded in 1973, Perry didn't join until 1977.