Multiple choice general knowledge

What is the main component of bones and teeth?

  1. Calcium carbonate

  2. Calcium phosphate

  3. Calcium sulphate

  4. Calcium nitrate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Calcium phosphate, specifically in the form of hydroxyapatite, makes up about 65% of bone weight and gives bones and teeth their hardness and rigidity. Calcium carbonate is found in seashells and eggshells, not in human bones.

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