Calcium regulation is the process by which the body maintains optimal levels of calcium in the blood and tissues. This is crucial for various bodily functions, including muscle contraction, nerve transmission, and blood clotting. The body uses hormones like parathyroid hormone and calcitonin to control calcium levels, ensuring they remain within a narrow range. The skeleton serves as a reservoir for calcium, releasing it into the bloodstream when needed. Additionally, the kidneys play a vital role by filtering calcium and reabsorbing it as necessary. Proper calcium regulation is essential for overall health and helps prevent conditions like osteoporosis.