Oxygen transport proteins are specialized molecules that carry oxygen throughout the body. The most well-known of these proteins are hemoglobin and myoglobin. Hemoglobin, found in red blood cells, binds oxygen in the lungs and releases it in tissues, while myoglobin, located in muscle cells, stores oxygen for immediate use during physical activity. These proteins contain iron, which allows them to bind oxygen effectively. The ability to transport and store oxygen is crucial for cellular respiration, enabling cells to produce energy. Proper functioning of oxygen transport proteins is essential for overall health and physical performance.