What structure covers the anatomical crown of a tooth?

The structure that covers the anatomical crown of a tooth is enamel. Enamel is the hard, outermost layer of the tooth and is the hardest substance in the human body. It serves as a protective barrier against physical and chemical damage, which is crucial for maintaining the overall health and function of the tooth.

Enamel is primarily composed of hydroxyapatite, a crystalline calcium phosphate, which contributes to its durability and resistance to abrasion. It also plays a vital role in the aesthetic appearance of teeth, as it is typically translucent, allowing the underlying dentin to impart color while also reflecting light to enhance the tooth's appearance.

Other options such as dentin, cementum, and pulp have distinct roles in tooth structure and function but do not cover the anatomical crown. Dentin is located beneath the enamel and is softer, providing support to enamel. Cementum covers the roots of the tooth and helps anchor it in the jawbone, while pulp is the innermost part containing nerves and blood vessels, critical for the tooth's vitality but not involved in external coverage of the crown.