Protein called hemoglobin found in our blood cells carry oxygen to cells.
Hemoglobin consists of four separate polypeptide chains, and each chain is specifically designed to carry a single iron atom in its heme group. Iron has a natural affinity for oxygen, which it carries to all our cells.
When lead is present in our bloodstream, the placement of iron in the heme structure is blocked, and so hemoglobin cannot carry oxygen.
This is what's referred to as lead poisoning. It occurs when lead is breathed or consumed through contaminated water or food. Lead poisoning causes serious health problems, including brain damage and anemia.
