Hémoglobine is a protein found in red blood cells that plays a crucial role in transporting oxygen from the lungs to the rest of the body. It binds to oxygen molecules, allowing them to be carried through the bloodstream. This process is essential for providing energy to cells and maintaining overall health. In addition to oxygen transport, hémoglobine also helps carry carbon dioxide, a waste product, back to the lungs for exhalation. The ability of hémoglobine to change shape allows it to pick up oxygen in the lungs and release it in tissues where it is needed most.