Platypuses eat without stomachs

Yep, their food goes right past it. It's a whole different digestive system

By Smartasaurus· 1 min read Wild

Imagine eating a plate of shrimp

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The short version

Yep, their food goes right past it. It's a whole different digestive system
Its diet consists of bottom-dwelling insects and shrimp, which it grinds up using hard pads in its mouth since it also has no teeth.
This raises a weird question: why evolve an organ as useful as a stomach just to throw it away?

The platypus is already a biological disaster, but its insides make even less sense: it completely lacks a stomach. When a platypus eats, the food travels down its throat and goes directly into its intestines.

In almost every vertebrate, the stomach uses acid and enzymes to break down complex proteins. The platypus simply deleted this step from its DNA millions of years ago.

Scientists found that the genes required to create stomach acid and digestive pepsin are actually missing from the platypus genome. They didn't just stop using them; they erased the blueprints.

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