The Bohr effect is a physiological phenomenon that describes how the binding of oxygen to hemoglobin in red blood cells is influenced by the concentration of carbon dioxide and pH levels. When carbon dioxide levels rise, or when pH decreases (becomes more acidic), hemoglobin releases oxygen more readily. This helps deliver oxygen to tissues that are actively metabolizing and producing carbon dioxide. This effect is crucial for efficient oxygen transport in the body. For example, during exercise, muscles produce more carbon dioxide and lactic acid, lowering the pH. As a result, hemoglobin releases more oxygen where it is needed most, enhancing overall metabolic function and supporting activities like those performed by athletes.