Iron is a chemical element with the symbol Fe (from Latin: ferrum) and atomic number 26. It's an essential component of hemoglobin, a protein that transports oxygen in the blood.
A red protein responsible for transporting oxygen in the blood of vertebrates.
Ferritin: A universal intracellular protein that stores iron and releases it in a controlled fashion.
Transferrin: The main protein in the blood that binds to iron and transports it throughout the body.