Iron (Fe) is a trace element that contributes to the composition of the protein called Hemoglobin. Hemoglobin is carried in red blood cells. Hemoglobin's main job is to carry oxygen throughout the body. So, when a person does not have enough iron in their body, they will begin to feel drowsy and fatigued, because the proper amount of oxygen is not available. This condition is called Anemia.
Iron
Basically hemoglobin is intended for oxygen transport from lungs to brain, muscle and whole body as needed...
Iron is the inorganic chemical element that characterizes hemoglobin. It is essential for the oxygen-carrying capacity of red blood cells, allowing them to transport oxygen from the lungs to tissues throughout the body.
Red blood cells contain hemoglobin and transport oxygen
Iron is the mineral needed for the transport of oxygen in the blood. It is a crucial component of hemoglobin, the protein in red blood cells that binds to oxygen and carries it from the lungs to the rest of the body.
Iron is the metallic element that is present in hemoglobin. It is essential for the transport of oxygen in the bloodstream.
Oxygen is carried by hemoglobin in red blood cells because it is not very soluble in blood plasma. Hemoglobin binds to oxygen in the lungs and releases it to tissues where it is needed. This allows for efficient transport of oxygen throughout the body.
to transport oxygen
Iron is bound to the center of hemoglobin, which transports oxygen. Depending on the meaning of element in the question, it could be Iron(most likely) or hemoglobin. ADDED: It is the iron: 4 iron molecules held within the haemoglobin molecule's hydrocarbon lattice. The oxygen binds physically to the Fe without reacting chemically.
A protein (hemoglobin) is required to transport Oxygen around the body.
hemoglobin
which permits them to transport oxygen and carbon dioxide