Respiratory proteins are specialized molecules that play a crucial role in transporting gases, particularly oxygen and carbon dioxide, within living organisms. The most well-known respiratory protein is hemoglobin, found in red blood cells, which binds to oxygen in the lungs and releases it in tissues. Another important respiratory protein is myoglobin, which stores oxygen in muscle cells, facilitating energy production during physical activity. These proteins contain metal ions, such as iron in hemoglobin, which enable them to bind gases effectively. In addition to hemoglobin and myoglobin, other respiratory proteins include cytochromes, which are involved in cellular respiration and energy production in cells. Together, these proteins are essential for maintaining proper gas exchange and supporting metabolic processes.