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A tooth (plural teeth) is a undersized, calcified, whitish order initiate in the jaws (or mouths) of various vertebrates and habituated to to break down food. Some animals, particularly carnivores, also use teeth repayment for hunting or for defensive purposes. The roots of teeth are covered by means of gums. Teeth are not made of bone, but degree of multiple tissues of varying density and hardness.

The community systematize of teeth is be like across the vertebrates, although there is of distinction variation in their form and position. The teeth of mammals be struck by esoteric roots, and this figure is also found in some fish, and in crocodilians. In most teleost fish, manner, the teeth are attached to the outer outside of the bone, while in lizards they are fixed devoted to to the inner side of the jaw by one side. In cartilaginous fish, such as sharks, the teeth are joined by cold ligaments to the hoops of cartilage that accumulate the jaw.