Why do we poop and pee?
John Thompson
Updated on January 05, 2026
You might wonder how your body ends up with waste it needs to get rid of. Body processes such as digestion and metabolism (when the body turns food into energy) produce wastes, or byproducts. The body takes what it needs, but the waste has to go somewhere. Thanks to the kidneys and pee, it has a way to get out.
Why do we pee when we poop?
When you do pass stool however, the relaxation of the stronger anal sphincter also decreases tension in the weaker urinary sphincter, allowing urine to pass at the same time.Why do humans have to poop?
Having a bowel movement is a critical part of digesting the food we eat. Stool formed by the large intestine is the body's way of getting rid of waste. While you should talk to your doctor about any concerns, changes in poop color and consistency could show what is happening inside your digestive system.Can you poop out your mouth?
It's possible to poop out of your mouthWhen people have a blockage in their small or large intestine, known as an intestinal obstruction, waste can't travel to the rectum. "If you have an obstruction generally in the lower small intestine or within the colon, you can eat food but it has nowhere to go," says Dr.