A tooth (plural teeth) is a cheap, calcified, whitish structure found in the jaws (or mouths) of many vertebrates and occupied to defeat down food. Some animals, strikingly carnivores, also use teeth for the purpose hunting or owing defensive purposes. The roots of teeth are covered nearby gums. Teeth are not made of bone, but fairly of multiple tissues of varying density and hardness.
The community design of teeth is similar across the vertebrates, although there is sizeable converting in their show up and position. The teeth of mammals be struck by deep roots, and this design is also initiate in some fish, and in crocodilians. In most teleost fish, manner, the teeth are fastened to the outer surface of the bone, while in lizards they are fastened to the inner surface of the jaw during one side. In cartilaginous fish, such as sharks, the teeth are joined by means of tough ligaments to the hoops of cartilage that form the jaw.
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