Tooth enamel , the hardest substance in the body is made up of_____.
calcium carbonate
calcium oxide
calcium hydroxiapatite
calcium hydrogen carbonate
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Enamel is the hardest substance in the human body, and it covers the outer surface of your teeth. It is made mostly of an extremely hard mineral called calcium phosphate. Dentin makes up the layer just below your tooth's enamel.
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Answer:Enamel is the hardest substance in the human body, and it covers the outer surface of your teeth. It is made mostly of an extremely hard mineral called calcium phosphate. Dentin makes up the layer just below your tooth's enamel.
Explanation: It is made mostly of an extremely hard mineral called calcium phosphate. Dentin makes up the layer just below your tooth's enamel.
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