What is hemoglobin primarily responsible for?

Hemoglobin is primarily responsible for carrying oxygen to all the cells in the body. This protein, found in red blood cells, binds oxygen in the lungs and transports it through the bloodstream to tissues and organs where it is needed for cellular respiration and energy production. The ability of hemoglobin to pick up oxygen and release it efficiently is crucial for maintaining metabolic processes and overall cellular function.

The other functions listed, such as transporting carbon dioxide away from cells, producing white blood cells, and facilitating the clotting process, are important physiological processes but are not the primary function of hemoglobin. While hemoglobin does assist in the uptake of carbon dioxide, this is not its main role; instead, it is primarily focused on oxygen transport.