Carbon dioxide transport refers to the movement of carbon dioxide (CO2) from the tissues of the body to the lungs, where it can be exhaled. This process occurs primarily through the bloodstream, where CO2 is carried in three forms: dissolved in plasma, bound to hemoglobin in red blood cells, and as bicarbonate ions. In the lungs, CO2 is released from the blood into the alveoli, tiny air sacs where gas exchange occurs. Once in the alveoli, CO2 is expelled from the body during exhalation. This transport mechanism is essential for maintaining the body's acid-base balance and overall respiratory function.