How many eyelids do frogs have?
The title may sound silly . Since frogs have 2 eyes , they must have 2 eyelids. But actual answer is they have 3 eyelids !
When frogs swim , they use this extra eyelid to cover their eye . It also acts as a protective layer to keep the foreign objects getting into the eye.
Every animal has 3rd eyelid , including humans ! But as the human species evolved , this 3rd eyelid got disappeared. We may have noticed the bulgy thing on the side of our eye . That used to be our 3rd eyelid. As man adopted lifestyle of staying on ground , this extra eyelid got disappeared.
The 3rd eyelid on a frog is called a nictitating membrane . This membrane is found in amphibians , reptiles , birds , fish etc.
The title may sound silly . Since frogs have 2 eyes , they must have 2 eyelids. But actual answer is they have 3 eyelids !
When frogs swim , they use this extra eyelid to cover their eye . It also acts as a protective layer to keep the foreign objects getting into the eye.
Every animal has 3rd eyelid , including humans ! But as the human species evolved , this 3rd eyelid got disappeared. We may have noticed the bulgy thing on the side of our eye . That used to be our 3rd eyelid. As man adopted lifestyle of staying on ground , this extra eyelid got disappeared.
The 3rd eyelid on a frog is called a nictitating membrane . This membrane is found in amphibians , reptiles , birds , fish etc.
Wouldn't that be 6 eyelids then? 3 per eye
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