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A tooth (plural teeth) is a small, calcified, whitish structure initiate in the jaws (or mouths) of many vertebrates and habituated to to defeat down food. Some animals, surprisingly carnivores, also partake of teeth in behalf of hunting or owing defensive purposes. The roots of teeth are covered by means of gums. Teeth are not made of bone, but to a certain extent of multiple tissues of varying density and hardness.

The ordinary structure of teeth is alike resemble across the vertebrates, although there is considerable modifying in their shape and position. The teeth of mammals get esoteric roots, and this pattern is also rest in some fish, and in crocodilians. In most teleost fish, how, the teeth are fastened to the outer outside of the bone, while in lizards they are attached to the inner side of the jaw alongside one side. In cartilaginous fish, such as sharks, the teeth are attached by means of rough ligaments to the hoops of cartilage that construct the jaw.

3 weeks ago.



Guest

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2 months ago.



Guest

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9 months ago from Kisel, Ukraine.



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