All this carbon dioxide basically leaves the red blood plasma cell and events essentially enters the alveolar space. And then via the process of exhalation, we essentially expel and release all that carbon dioxide into the outside environment. And then the plants use this CO2 in a process called photosynthesis to basically produce sugar molecules. Then we either eat the plants or we eat the animals that ate the plants. And the cycle basically repeats itself. So we conclude that carbon dioxide is carried in our cardiovascular system in three different ways.