The Major Function of Iron in the Body Is the Formation

The major function of iron in the body is the formation of compounds essential to the transportation and utilization of oxygen. To further this purpose,

A) approximately 70 percent of the body iron is in storage form.
B) the iron that is stored in the tissues is stored principally as compounds called ferritins.
C) the vast majority of iron in the body is used to form hemoglobin.
D) the body loses 10-15 mg of iron each day.