Urinary System

Our excretory system excretes waste from our body. Two organs called kidneys clean waste from blood. The waste combines with water to make urine. Urine travels down two tubes called ureters and collects in a bag called the bladder. When the bladder is full, the urine leaves the body through the urethra.

Our body also eliminates waste through the skin. This waste is in the form of a liquid called sweat.