Shark teeth by www.prionace.it

Sharks body is covered with placoid scales, also called like small teeth. They have the same structure of those of greater dimensions, that are found in the jaws.
The placoid scales, besides constituting an effectiveness protection of the shark body, reduces also the resistance to the sea water, improving animal capacity to swin.
The teeth that are found in the superior and inferior jaws are modified placoid scales and they are very great.
Their form and disposition point out of what preys the sharks are usual to feed in fact long and sharp teeth as those of the bull shark (Carcharias taurus) are proper to pierce and to hold back small fishes and cefalopods, while those more breadths and pieces as those of the shark tiger (Galeocerdo cuvier) develop a greater resistance and they serve for shattering hulls and to shear pieces of food.
The teeth of the sharks are anchored in the "derma" through fibers of connective fabric, the external covering is constituted by enamel that protects a layer of "dentina" to whose inside is found the pulp.
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In this page are visible the photos of the teeth of:
Zambesi shark (Carcharhinus leucas)
Bluntnose sixgill shark (Hexanchus griseus)
Smalltooth sandtiger shark (Odontaspis ferox)
Megalodon shark (Carcharodon megalodon)
Blue shark (Prionace glauca)
Tiger shark (Galeocerdo cuvier)
Grey nurse shark (Carcharias taurus)
White shark (Carcharodon carcharias)
Mako shark (Isurus oxyrinchus)
Otodus shark (Otodus obliquus)
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