Hemoglobin is the protein molecule in red blood cells that carries oxygen from the lungs to Heart and to continue the Inhaling and Exhaling Proccess.
They are responsible of Healing any kind of cut , they stop the blood flow and they are also reponsible to open any kind of plaque inside vains to prevent heart attacks. IF you smoke Hemoglobin will carry the necotin every where it goes because Necotine get stuck on the hemoglobin and reduce its functions so the hemoglobin wont be holding much oxygen in every breathing proccess thats why we see people who smokes breathes more than natural people when they do any activity . There body needs Oxygen but the hemo. aint functioning in the way they have to .