littlemm2008
littlemm2008
21-01-2021
Chemistry
contestada
Calcium
and what
makes bones hard
Respuesta :
avrian86
avrian86
21-01-2021
Bones are made up of a framework of a protein called collagen , with a mineral called calcium phosphate that makes the framework hard and strong. Bones store calcium and release some into the bloodstream when it's needed by other parts of the body.
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