Michigan Esthetician State Board Exam Practice 2026 – Complete Prep Guide

Iron is essential for the oxygenation of the blood because it is a key component of hemoglobin, the protein in red blood cells that binds to oxygen. When oxygen enters the bloodstream in the lungs, it attaches to iron within hemoglobin, allowing red blood cells to transport oxygen from the lungs to the rest of the body. This process is crucial for cellular function and energy production because all body tissues require oxygen to carry out their metabolic processes.

While calcium, magnesium, and zinc play important roles in various bodily functions, they are not directly involved in the transport of oxygen in the blood. Calcium is primarily associated with bone health and muscle function; magnesium is involved in numerous enzymatic processes and energy production; and zinc plays a role in immune function and wound healing. Therefore, iron specifically stands out in the context of oxygen transport, making it the correct choice for this question.