No, bones are not the most common substance in the human body. The most abundant component is water, which makes up about 60% of an adult's body weight. After water, proteins and lipids are also more prevalent than bones. Bones account for approximately 15% of body weight, making them significant but not the most common substance.
cartilage
Enamal is tha hardest part of human body..
Calcium
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That is calcium.
calcium
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Calcium
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