| | Conditions Treatments | Blood Disorders What is another duty of red blood cells? Red blood cells also contain the protein hemoglobin, which binds to oxygen and transports it to cells throughout the body. Blood Disorders - Related Articles How Make ED Work What bacteria is usually found in urine? Allergies Vs. Colds in Children Glucosamine: Skin Benefits Why do eye colors change? Parts of a Thermometer Sleep Attacks: What You Should Know