BSIP, JACOPIN / SCIENCE PHOTO LIBRARY BSIP, JACOPIN / SCIENCE PHOTO LIBRARY
Tooth structure. Artwork of a section through a tooth showing its internal structure. The outer white layer is the enamel, a hard substance which protects the tooth from wear and damage. Beneath this is a layer of dentine (pink), a tough tissue which encases and protects the pulp. The pulp contains blood vessels, arteries (red) and veins (blue), and nerves (yellow). The tooth is anchored in the jaw bone (pale yellow), which contains the larger nerves and blood vessels supplying the pulp. The part of the tooth above the gum (dark pink) is called the crown.
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