We generally don’t like to think about the fact that there is a large worm-like organ inside of our abdomens. That’s the sort of thing which you usually only have to make peace with when watching horror comedies like Slither, but it doesn’t stop it from being true. Your intestines stretch for roughly 15 feet inside your body, winding a path between your stomach and rectum.

Despite being among the creepiest of your internal organs, your intestines play a crucial role in your everyday life, taking up nutrients from the food you eat and ridding your body of waste, but their job ends at your end. They can’t, for instance, help you breathe right?

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Getting the oxygen needed for survival is achieved through various processes in the animal kingdom. Insects gather oxygen through holes in in their bodies known as spiracles, and some vertebrate animals can breathe through their butts. Sort of.

Read more: yahoo