Final answer:
Approximately 99% of the body's calcium is stored in the skeleton, which is essential for maintaining normal physiological functions in addition to bone strength.
Step-by-step explanation:
About 99% of the body's calcium is present in the skeleton. The calcium in our bodies is not only essential for giving bones their strength and rigidity but is also critical for other physiological processes. These processes include regulation of the heart rate, blood coagulation, muscle contractions, and nerve impulse conduction. Normal calcium homeostasis with a blood calcium level of about 10 mg/dL is maintained by the dynamic equilibrium of bone calcium exchange and through regulated dietary intake and kidney function. The skeletal system is not only the structure for our bodies but also serves as the main reservoir of calcium, which is subsequently utilized for critical functions throughout the body.