MICROANATOMY

Detailed explanation-1: -Hemoglobin is the protein inside red blood cells. It carries oxygen.

Detailed explanation-2: -It is the millions of iron-containing haemoglobin proteins that make blood red. Molecules with more oxygen bound to them are brighter red. When the red blood cells reach tissues that need oxygen, the oxygen is released from the haemoglobin and diffuses into the cells where it is used to make energy.

Detailed explanation-3: -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-4: -Hemoglobin (Heme + Globin) The protein hemoglobin is a molecule which is responsible for carrying almost all of the oxygen in the blood.