The role of calcium in bodily functions is vital, primarily for maintaining strong bones and teeth. Calcium plays a critical part in various physiological processes, including muscle contraction, blood clotting, and nerve transmission. Adequate calcium intake helps prevent osteoporosis, especially in older adults. The body regulates calcium levels through hormones and dietary sources, such as dairy, leafy greens, and fortified foods. A balanced intake is essential to support lifelong bone health and overall bodily functions.