explain transport of carbondioxide?
Carbon dioxide produced in the tissue cells diffuses into the blood plasma and red blood cells. The carbon dioxide in the red blood cells is transported as: dissolved CO2, combined with hemoglobin, or as bicarbonate. After this the carbon dioxide rich blood or deoxygenated blood is transported to the lungs where carbon dioxide is thrown out into the alveoli due to the concentration difference (more concentration of carbon dioxide in blood vessels as compared to carbon dioxide concentration in alveoli) and oxygen is taken in due to less concentration of oxygen inside the blood vessels as compared to the oxygen concentration in alveoli. After the diffusion of carbon dioxide into the alveoli it is thrown outside the body via nostrils.