Inside the tooth, under the white cap and the bone-like dentin, is a soft tissue called the pulp. The pulp contains blood vessels, nerves, and connective tissue. It extends from the crown of the tooth to the tip of the roots where it connects to the tissues surrounding the root. The pulp is important for a tooth's growth and development, participation in the formation of the enamel and dentin. Once a tooth is fully mature it can survive without the pulp, but, if so, it would no longer perceive temperature. A tooth is connected to the bone via a living periodontal membrane, independent of the pulp.