Facts about urine

• Adults pass about a quart and a half of urine each day, depending on the fluids and foods consumed.
• The volume of urine formed at night is about half that formed in the daytime.
• Normal urine is sterile. It contains fluids, salts and waste products, but it is free of bacteria, viruses and fungi.
• The tissues of the bladder are isolated from urine and toxic substances by a coating that discourages bacteria from attaching and growing on the bladder wall.