Which structure of a tooth contains nerves and blood vessels?

The structure of a tooth that contains nerves and blood vessels is the pulp. The pulp is located in the center of the tooth and is composed of soft connective tissue, which includes not only nerves and blood vessels but also cells that contribute to the tooth's health and maintenance. This living tissue is essential for providing nutrients to the tooth and allowing for sensations such as pain when there is an issue, such as decay or injury.

In contrast, enamel is the hard outer layer of the tooth that protects against decay but does not contain nerves or blood vessels. Dentin, which lies beneath the enamel, is a hard tissue that supports enamel and contains tiny channels called tubules but does not house nerves and blood vessels directly; rather, it is connected to the pulp. Cementum is the covering of the tooth root and helps anchor the tooth to the jawbone, but like enamel and dentin, it does not contain nerves or blood vessels.