What is the hard, calcified tissue beneath enamel that forms the tooth body?

• A. Pulp
• B. Cementum
• C. Dentin
• D. Enamel

Answer: (C)

Dentin is the hard, calcified tissue beneath enamel that forms the main body of the tooth. It lies just under the enamel, surrounds the pulp, and is produced by odontoblasts from the dental pulp. Dentinal tubules extend from the pulp toward the dentin‑enamel junction, giving dentin its sensitivity and ability to respond to stimuli. While enamel is the extremely hard outer layer and cementum covers the root, pulp is the soft tissue inside, dentin is the tissue that makes up the tooth’s bulk beneath enamel.