TOOTHENAMEL
Tooth enamel
Tooth enamel is one of the four major tissues that make up the tooth in humans, many other animals, including some species of fish. It makes up the normally visible part of the tooth, covering the crown. The other major tissues are dentin, cementum, and dental pulp. A white parasol that protects the teeth but can easily destroyed and decayed.The above text is a snippet from Wikipedia: Tooth enamel
and as such is available under the Creative Commons Attribution/Share-Alike License.