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Skeletal System

Introduction

Why is calcium important to the body?

Bones consist mainly of calcium. Calcium plays an important role as a cofactor for enzyme function, in maintaining cell membranes, in muscle contraction, nervous system functions, and in blood clotting. When the diet does not provide a sufficient amount of calcium, it is released from the bones, and when there is too much calcium in the body, it is stored in the bones.



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