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Beaver Dissection

Eyes, Ears and Nose

-3 eyelids

-special film on eyes when swimming

-very good sense of smell

-poor vision so they rely on sound and smell

Teeth

20 teeth and 16 molars, mainly used for grinding bark or other food for digesting.

The Brain

The brain of an American beaver is about 45 g in weight.

Fur

They have 2 layers of fur. Guard hairs measure 2.5 inches long and underfur is about 3/4 inches long. They trap air in between the layers of fur while swimming under water and helps protect the beaver from the cold water.

Heart

Beaver hearts are similar to those of other mammals. However, variations in details of anatomy exist, especially for the right atrium which is divided into 2 appendages.

Bones

Lungs and liver

The beaver has 302 bones.

Beaver lungs and liver have the adapted ability to store more oxygen than a regular mammal.

Feet

Beavers have webbed hind feet

and the second to on each foot has a split nail for grooming

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