bed. The unguis grows outward faster than the subunguis to produce a curve and the thinner sides of the claw wear away faster than their thicker middle, producing a more or less sharp point. Tetrapods use their claws in many ways, commonly to grasp or kill prey, to dig and to climb and hang.

Mammals

All carnivorans have claws, which vary considerably in length and shape. Claws grow out of the third phalanges of the paws and are made of keratin.

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