Calcium phosphate crystals serve what role in bone?

• A. They provide tensile strength
• B. They act as the primary organic matrix
• C. They contribute to bone rigidity and hardness
• D. They assist in bone growth

Answer: (C)

Calcium phosphate crystals are critical components of bone tissue, playing a significant role in its structure and function. Specifically, these crystals contribute to the rigidity and hardness of bone. They form a mineralized matrix that is essential for providing the mechanical strength necessary for bones to withstand various stresses and strains during daily activities and physical exertion.

The presence of calcium phosphate in the bone matrix enhances its ability to resist compression forces, making bones both strong and durable. This mineralization process involves the deposition of hydroxyapatite, a form of calcium phosphate, which integrates with the organic components of bone, primarily collagen fibers, to create a composite material that is effective under load.

Understanding this function of calcium phosphate helps underscore the importance of mineral composition in maintaining bone health and integrity.