Camels have not one, not two, but three eyelids.Called a nictitating membrane, the transparent lid helps keep out sand and dust; it can even improve vision, like a contact lens.
Many animals, including dogs, cats, sharks, and some birds and amphibians, also have third eyelids.Very few people know that camel eyes have three eyelids.There is a special reason for this.
The three eyelids in a camel’s eye are related to its habitat.Sand is found in desert areas.Both of these factors affect the body of a camel.
The camel’s eyes can be damaged by sandstorms or strong winds in places around the year.The three eyelids in the camel’s eye protect it from the sand.
The camel’s eyelids are not the only ones.Careful examination of the camel reveals thick hair on its eyebrows and eyelids.
They also protect the eyes from dust, dirt and sand.They close when strong winds blow.
Thus the eyebrows and eyelids are used to protect from dust and sand.Not only this, the camel’s nose has special muscles that work to stop the sand from getting into the nose.
As soon as the sand enters the nose, these muscles contract.As a result, the sand does not reach the inside.
In this way the body of the camel is adapted to live in the sand.The ears of the camel are very small compared to the size.
The inside of the ears also have a lot of hair.They protect dust, dirt and sand from entering the ears.
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