Daily Wrap on MSN8 个月
Third eyelid: A hidden shield in animals' eyes
The nictitating membrane, or third eyelid, is found in most terrestrial vertebrates and some cartilaginous fish. Unlike the ...
来自MSN1 个月
The Leftovers Of A Third Eyelid Can Still Be Found In Your Eye
The nictitating membrane, or third eyelid, can be found in many animal groups still alive today. Perhaps the easiest to observe it in are domestic cats, and if your cat is as prone to falling ...