Why are RBCs capable of transporting oxygen?
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RBC contains mitocondria the power house of a cell
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Hemoglobin binds oxygen by rusting on the atomic level. The hemoglobin molecule in red blood cells is what the U.S. Department of Energy's Office of Science calls a "metalloprotein." That is, it is a protein that incorporates some metal, iron in this case, into its structure. (How does hemoglobin carry oxygen?)
That’s why our blood is rusty red. Those erythrocytes also exchange the waste products of cellular function back to our heart, ultimately through the pulmonary phase from the right ventricle, to the (ultimately) alvioli, to repeat. Over and over.
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