ANATOMY

Detailed explanation-1: -Red blood cells contain a protein called hemoglobin, which carries oxygen from the lungs to all parts of the body.

Detailed explanation-2: -Red blood cells carry oxygen from our lungs to the rest of our bodies. Then they make the return trip, taking carbon dioxide back to our lungs to be exhaled.

Detailed explanation-3: -Hemoglobin is the protein that carries oxygen and exists within each red blood cell. If your red blood cell was a vehicle, hemoglobin is in the driver’s seat, picking up oxygen at the lungs and transporting it to the tissues throughout your body.

Detailed explanation-4: -Red blood cells pick up oxygen in the lungs. Blood travels away from the heart and lungs through the arteries (ar-tuh-reez). Red blood cells drop off oxygen to the cells through tiny tubes called capillaries (cap-ill-air-ies). Blood then returns to the heart through the veins (vayns) and the cycle begins again.