My name is Chappell I am the creator of this website. Facts about the Urinary system. The volume of urine formed at night is about half that formed in the day. Adults pass about a quart and a half of urine each day. It contains fluids and salts,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.

Fact About The Digestive system. Photos used under Creative Commons from Hey Paul Studios.

Here is a picture of the muscular system and the parts of the human body this is a very interesting picture.