The element essential for human bones and teeth is calcium. Calcium is a vital mineral that provides strength and structure to bones and teeth, helping to maintain their integrity throughout life. It plays a crucial role in various bodily functions, including muscle contraction, blood clotting, and nerve transmission. The human body does not produce calcium on its own, so it must be obtained through diet, with good sources including dairy products, leafy greens, and fortified foods. Maintaining adequate calcium levels is important to prevent conditions such as osteoporosis and promote overall bone health as one ages.