+Hemoglobin is the crimson heart within [Red Blood Cells](/wiki/red_blood_cells), an [Iron](/wiki/iron)-rich protein. It clasps life-giving oxygen in the lungs and delivers it throughout the body, painting our blood red.
+## See also
+- [Oxygen](/wiki/oxygen)
+- [Blood](/wiki/blood)
+- [Protein](/wiki/protein)
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