Where Do the Chicken Eggs Come out Of

Where Do the Chicken Eggs Come out Ofの基本情報から最新動向までを徹底的にカバーしました。

Chickens have one single multi-purpose opening back there. It’s called the cloaca. Fancy word, right? It’s like the Swiss Army knife of bird anatomy.

This one hole handles everything. Poop, pee (which is mostly white paste, by the way), and eggs. All through the same exit. I know, I know. That sounds... unsanitary.

But here’s the thing: the egg gets a express lane. The cloaca can actually push the egg out without any, uh, contamination. Nature is weirdly polite about it.

How the egg actually makes its grand exit

The egg starts its journey deep inside the hen. Think of it like a factory assembly line. It takes about 24 to 26 hours from start to finish.

First, the yolk drops into the oviduct. That’s where the white gets layered on, then the membranes, then the shell. The shell is added last, like a final coat of armor.

When the egg is fully formed, it does a slow shimmy toward the cloaca. The hen’s muscles contract, and pop—out it comes. It’s not a squirt. It’s more like a gentle, deliberate delivery.

And yes, the egg comes out the same hole as everything else. But it’s clean. I promise. The cloaca has a special fold that keeps the egg separate from the waste until the very last moment.