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Geeta Pandey

Nda & Airforce
General Awareness
2 years ago

hardest material of the body

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Dileep Vishwakarma

2 years ago

Tooth enamel (the surface of your teeth that you can see) is the hardest substance in the human body - even harder than bone! Tooth enamel isn't living and is mostly made of apatite crystals which contain calcium and phosphate.

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Shravan Kumar

2 years ago

एनामल

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2 years ago

enamel

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