Where Can Most of the Oxygen in the Blood Be

Question

Where can most of the oxygen in the blood be found?
A) bound to hemoglobin
B) in white blood cells
C) combined with carbon dioxide
D) dissolved in the plasma

Accepted Answer

Most of the oxygen in the blood is bound to hemoglobin, a protein found in red blood cells. Hemoglobin can carry up to four molecules of oxygen per molecule of hemoglobin.