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# Bone Composition The document describes the composition of bones. ## Components of Bone * 25% Water * 25% Organic Materials * 50% Inorganic Materials ## Organic Materials The major organic component is **collagen**, a protein found in abundance in the body. Collagen provides bones with...

# Bone Composition The document describes the composition of bones. ## Components of Bone * 25% Water * 25% Organic Materials * 50% Inorganic Materials ## Organic Materials The major organic component is **collagen**, a protein found in abundance in the body. Collagen provides bones with: * Significant strength * Flexibility ## Inorganic Materials The inorganic components, primarily **calcium salts**, provide rigidity and strength to the bone structure. Specifically, calcium helps to: * Make the bone hard * Increase its resistance to compressive forces The text estimates that an average adult human has approximately 7 kg of calcium. ## Overall Function Organic materials give bones flexibility, while inorganic components provide bone strength. This combination allows bones to be both strong and flexible.