Calcium is the element essential for the formation of bones and teeth. It plays a fundamental role in providing strength and structure to skeletal systems in both humans and animals. Approximately 99% of the body's calcium is stored in bones and teeth, where it combines with phosphate to create a hard matrix. In addition to its role in forming bones, calcium is crucial for various physiological functions, including muscle contraction, blood clotting, and nerve signaling. A balanced diet that includes calcium-rich foods, such as dairy products, leafy greens, and fish, is important for maintaining bone health.