The nictitating membrane is the transparent layer the covers the outside of a frogs eye.
Frogs have a so-called Nictitating membrane, which they can slide over their eyes for protection. They do this while jumping and swimming.
The frog's eye has a nictitating membrane that covers the eye and allows the frog to see underwater with ease.
Most frogs have a nictitating membrane. It's a sturdy film that covers and protects the eye while the frog is underwater.
The nictitating membrane is a translucent membrane at the bottom of the eye that can be pulled up right across the eye. It is not an eyelid because the frog can still see when the membrane is raised. It is used when swimming or when insects are swarming around the frog's eyes, and also for keeping the eyes moist when it is windy.
its the peritinoneum
In a frog, it's the peritoneum.
Don't know what you mean by 'serious.' Do you mean 'serous' as in fluid-filled? The membrane that can cover over a frog/toad's eyes (and other amphibian, reptile, even mammal species) is known as a 'nictating' membrane. It is there to protect against fluid and debris from coming into contact with the corneal surface of those eyes.
The tympanic membrane.
The nictitating membrane is part of a frog's eye. It is just above the lower lid and acts as a protective third eyelid.
It is a thin lining over the eye of a frog which gives it extra protection
It is called the tympanic membrane and is used for hearing.
The tympanic membrane on the leopard frog is what would be considered their eardrum. It is located directly behind the frog's eye, externally.
The nictitiating membrane protects the eye so frogs can see in water.