Here's what happens to your knuckles when you crack them

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Here's what happens to your knuckles when you crack them

There's a space in your joints filled with synovial fluid, a liquid that reduces the friction in your joints when you move. It contains gases (oxygen, nitrogen, and carbon dioxide).

When you pop a joint, you stretch out that space between the bones. That expanding space creates negative pressure, like a vacuum, that sucks in the synovial fluid. It forms bubbles, which then collapse, and that's what you hear.

Here's what happens to your knuckles when you crack them


Source: Vox via ScienceDump

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Thinking Humanity: Here's what happens to your knuckles when you crack them
Here's what happens to your knuckles when you crack them
There's a space in your joints filled with synovial fluid, a liquid that reduces the friction in your joints when you move. It contains gases (oxygen, nitrogen, and carbon dioxide).
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https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj2iXpKDyW5u8xbKwnzA7QDgHpiTx1qCZl221wuhUHnk2BEpG6K8eXWAfaRfJSb_mNEeDZXkV7MZx3bjZUT3VyDrbfXs5nzKnzPT0fBXIkD96SKMs9SUcbifXxaUHUJykx89YWEQU_8_I5H/s72-c/Here's%2Bwhat%2Bhappens%2Bto%2Byour%2Bknuckles%2Bwhen%2Byou%2Bcrack%2Bthem.jpg
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