What hole does urine come from?

Urine or pee as some like to call it is a mixture of water and unwanted impurity's and waste products that are found in the body. when you drink water is introduced into the system. this makes up a big proportion of our body's. the body uses water and blood to transport materials around the system. some of this water has poisons that the body produces dissolved in it it which moves through the kidneys. the kidneys are a filter that sorts these poisons out and transports them along with water to the bladder. this process goes on non stop and as the bladder fills you have to urinate to make room for more. Some of these waste products are also removed through the skin as sweat and through the large intestine which aids in softening stool. Urine is Metabolic waste.