EVERYDAY SCIENCE

Detailed explanation-1: -Hemoglobin contains iron, which allows it to pick up oxygen from the air we breathe and deliver it everywhere in the body. You can think of hemoglobin as the iron ("heme"), oxygen transport protein, ("globin") found in red blood cells. It’s the hemoglobin that gives red blood cells their color, too.

Detailed explanation-2: -Red blood cells contain hemoglobin-an iron-rich protein that gives blood its red color. Hemoglobin enables red blood cells to carry oxygen from your lungs to all parts of your body and to carry carbon dioxide from other parts of the body to your lungs to be exhaled.

Detailed explanation-3: -Iron cycle 10.30). Central to this cycle is the plasma compartment in which iron is bound to a transport protein – transferrin. Iron moves from plasma to cells that have the capacity to make haemoglobin. At the end of the red cells’ 120-day lifespan, they are ingested by macrophages of the reticuloendothelial system.