1.

(a) Which part of the tooth is the hardest substance in the body? It is rich in which mineral? (b) A tooth is man is composed of which material? What is enclosed in it?

Answer» (a) Enamel is the hardest substance in the body. It is rich in calcium.
(b) In man, tooth is composed of hard, bone-like substance called dentine. It enclose the pulp cavity.


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