Wastes in the blood come from tissue breakdown, and from food. After the body takes and uses what it needs, it sends the wastes to the kidneys. The kidneys are bean-shaped organs, about the size of a fist. Having atleast one kidney is mandatory for living, unless treated immidietally. read more
It's a very important role, even if we often forget the lungs as part of the excretory system. Excess CO2 can cause all sorts of respiratory, cardiovascular and nervous problems, so getting rid of it is absolutely necessary. read more
Your skin has a very important part in the excretory system. It holds moisture into every part of your body. In the excretory system, the skins job is to regulate one's body temperature. The salt in the skin helps in evaporation of the water off of the body, to cool off one who is hot. Sweat is excreted through sweat glands. read more