Whales (Cetaceans Misticeti) actually have no real teeth but "fanoni". These are laminae composed of a substance based on keratin (a filamentous and very resistant protein that makes them rather elastic, rich in sulfur) and small amounts of a bone mineral called hydroxyapatite, in addition to traces of manganese, copper, boron, iron and soccer.

Whale bones
These cetaceans use them as a sort of filter to hold food and expel water from the mouth: they are in fact fixed to the upper jaw and arranged in two parallel rows, they are wider near the gums and, according to the different species, their length varies from 0.5 to 3.5 meters. The longest belong to the so-called "Greenland whales", which have a very curved lower jaw and a narrow upper jaw. In the past, the bunting was widely used to build objects of various kinds, such as whips for carters, rods for umbrellas, sticks to stiffen the corsets of women's clothes. Now instead plastic is used instead.

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