Enamel is not found in the root of a tooth. Enamel is the hard, outermost layer of the crown of a tooth, which covers the dentin. The root of a tooth is covered by cementum, which is a thin layer of hard, mineralized tissue that helps anchor the tooth in the jawbone. Beneath the cementum lies the dentin, which forms the bulk of the tooth and contains the pulp, a soft tissue that contains nerves and blood vessels.