Everyday Science Mcqs

Q.  Which is the hardest substance in the human body?

a. Tooth enamel
b. Skull
c. Knee cap
d. Rib


ANSWER: See Answer
 
Enamel is the hardest substance in the human body and contains the highest percentage of minerals, 96%, with water and organic material composing the rest. The primary mineral is hydroxyapatite, which is a crystalline calcium phosphate
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