In humans,the nictitating membrane is a/an... | vedclass

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(B) The nictitating membrane is a transparent or translucent third eyelid that can be drawn across the eye for protection and to moisten it while main

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Vestigial organ

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(B) The nictitating membrane is a transparent or translucent third eyelid that can be drawn across the eye for protection and to moisten it while maintaining vision. In humans,this structure is reduced to a small,pinkish fold of tissue located in the inner corner of the eye,known as the plica semilunaris. Because it no longer serves its original protective function in humans,it is considered a vestigial organ.

In humans,the nictitating membrane is a/an....

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