Final answer:
Calcium is the mineral that is mostly stored in bones and teeth. It is necessary for various physiological processes in the body.
Step-by-step explanation:
The mineral that is mostly stored in bones and teeth is calcium. About two pounds of calcium in the body are bound up in bone, providing hardness and serving as a mineral reserve for calcium and its salts for the rest of the tissues. Teeth also have a high concentration of calcium within them. Calcium ions, Ca²+, are necessary for muscle contraction, enzyme activity, blood coagulation, cell membrane stabilization, and the release of neurotransmitters and hormones.