The crown of a tooth is composed of a core of living tissue called _____ surrounded by a layer of nonliving _____, the hardest substance in the body.

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Anatomy refers to the internal and external structures of the body and their physical relationships, whereas physiology refers to the study of the functions of those structures.


1. The crown of a tooth is composed of a core of living tissue called _____ surrounded by a layer of nonliving _____, the hardest substance in the body.