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Digestive System

The digestive system is in charge of absorbing and transporting nutrients your body needs in order to thrive -- and it gets rid of all the waste the body doesn't need. Discover how saliva breaks down the food you eat and more.

Why Chugging a Gallon of Milk Is Nearly Impossible

Can you drink a gallon of milk in an hour? HowStuffWorks explains why milk chugging, or the gallon challenge, is tough on the human body. See more »

Ridiculous History: Toxic German Sausages Are Responsible for Botox

Botox has its origins in the discovery of botulism and a bad batch of German sausages. Learn more about Botox in this HowStuffWorks Now article. See more »

Why Do Opioids Cause Constipation?

With opioid use and abuse at an alarming high in the U.S., the side effects of opioid use have become a growing concern. HowStuffWorks Now explores. See more »

It's an Electrical Cheese Sandwich for Your Gut

University of Arizona engineers successfully built an edible supercapacitor. Word is, it tastes like cheese and might be handy if you have GI issues. See more »

Cow Burps, Not Farts, Are the Real Problem

How can a feed additive reduce cow burps? Learn how a feed additive reduce cow burps at HowStuffWorks Now. See more »

When you smell poop are you actually inhaling poop molecules?

Smelling poop is gross enough, so the possibility that poop molecules are getting into your nose is outright disgusting. Learn more at HowStuffWorks. See more »

Why is baby poop so smelly?

Baby poop is smelly. Find out why baby poop stinks at HowStuffWorks. See more »

How fast does a fart travel?

We all fart, but how fast does that fart travel out of your body? Find out and learn more about passing gas at HowStuffWorks. See more »

What happens when you hold in a fart?

Could holding in a fart be bad for your health? Find out what happens when you hold in a fart at HowStuffWorks. See more »

Why do farts stink?

Everybody poops, and everybody passes gas. Learn why farts stink at HowStuffWorks. See more »