Question

answer the encircled ones!!

Answer 1

4.
Answer:
**Hardest tissue is DENTINE which is covered by the hardest substance of body, named ENAMEL.
Explanation:
Dentine is made of odontoblast cells. Enamel is deposited by ameloblast cells but the cells are lost after tooth eruption.
70% of dentine is inorganic salt. It is less mineralised compared to the enamel, but its mineral composition is higher than the bones.

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