2025nmejia
2025nmejia 2025nmejia
  • 25-10-2021
  • Physics
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is it possible for humans to use there extra eyelid?

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Izzy1597
Izzy1597 Izzy1597
  • 25-10-2021

Answer:

Known as the “plica semilunaris,” it's much more prominent in birds and a few mammals, and functions like a windshield wiper to keep dust and debris out of their eyes. But in humans, it doesn't work. It's vestigial, meaning it no longer serves its original purpose.

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