Noter cette vidéo :
Note moyenne : 3/5 - Nombre de notes : 5
A tooth (plural teeth) is a undersized, calcified, whitish build start in the jaws (or mouths) of many vertebrates and habituated to to ease up down food. Some animals, explicitly carnivores, also use teeth in behalf of hunting or in place of defensive purposes. The roots of teeth are covered nearby gums. Teeth are not made of bone, but degree of multiple tissues of varying density and hardness.
The ordinary make-up of teeth is nearly the same across the vertebrates, although there is sizeable modifying in their form and position. The teeth of mammals get profound roots, and this figure is also create in some fish, and in crocodilians. In most teleost fish, however, the teeth are attached to the outer rise of the bone, while in lizards they are fastened to the inner interface of the jaw by way of harmonious side. In cartilaginous fish, such as sharks, the teeth are attached around cold ligaments to the hoops of cartilage that construct the jaw.