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結果 : what is a third eyelid
4:36

Why do humans have a third eyelid? - Dorsa Amir

TED-Ed
1,863,458 回視聴 - 4 年前

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0:21

08 Exposing a dog's 3rd eyelid

African Veterinary Information Portal (AfriVIP): Onderstepoort
29,645 回視聴 - 6 年前
4:40

Third eyelid (nictitating membrane)

Helpful Vancouver Vet
158,119 回視聴 - 3 年前
3:23

What Is And What Is The Purpose Of A Horse's Third Eyelid

Stable Horse Training
4,633 回視聴 - 5 年前

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2:20

Dreaming dog with 'nictitating' third eyelid

MadraRua2009
17,196 回視聴 - 12 年前
1:14

Australian Magpie's Nictitating Membrane (Third Eyelid)

The Magpie Whisperer
7,316 回視聴 - 6 年前

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2:33

WHY DO CATS HAVE A THIRD EYELID AND WHAT DOES IT MEAN IF IT'S SHOWING

Wild Life With Thomas
4,086 回視聴 - 3 年前
2:15

THIRD EYELID, BLACKBIRD.

hebrideanwild
558 回視聴 - 3 年前
0:17

Haw's syndrome - It is a condition where both third eyelids protrude

Let's Grab Knowledge
1,280 回視聴 - 2 年前
1:36

Neuroscientist reveals the truth about the third eye l GMA

Good Morning America
90,452 回視聴 - 3 年前
0:24

How To Examine The 3rd eyelid

James Horner Vets
1,043 回視聴 - 1 年前
2:04

The Surprising Science Behind a Dog's Third Eyelid

Miscellaneous Curiosities
155 回視聴 - 1 年前
0:55

What is the third eyelid in cats and dogs? - Dr. Justine Lee

Litter-Robot
2,722 回視聴 - 6 年前