Friday, 3 February 2012

Why do bones remain for centuries after a person dies?

Bones are made of two main materials:

Calcium salts make bones hard, and Collagen fibres make them strong but also a bit flexible.

After death the collagen rots away, leaving just the durable hard parts behind. In life, the bones of a person's skeleton support the body and protect its internal organs.

1 comments:

We know that. The question was why.

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