Iron is a segment of the hemoglobin molecule in your blood that carries oxygen to your cells and carries carbon dioxide back to the lungs for excretion.
(Iron; is; a segment of the hemoglobin molecule in your blood) (your blood; carries; oxygen; to your cells) (your blood; carries; carbon dioxide; back to the lungs for excretion)
Iron your blood your blood
is carries carries
a segment of the hemoglobin molecule in your blood
oxygen to your cells
carbon dioxide back to the lungs for excretion