Final answer:
Calcium is essential for bone formation, blood coagulation, muscle excitation, nerve impulse conduction, and regulation of endocrine glands, and is the most abundant mineral in the body.
Step-by-step explanation:
Calcium is the mineral element necessary for bone formation, coagulation of blood, excitation of cardiac and skeletal muscle, conduction of nerve impulses, and regulation of endocrine glands. It is the most abundant mineral in both the human body and in bone, playing vital roles beyond those in the skeletal system. The normal level of calcium in the blood is about 10 mg/dL, which is critical for various bodily functions, including muscle contraction, blood clotting, and nerve function.