Biological role Carbon dioxide is an end product of cellular respiration in organisms that obtain energy by breaking down sugars, fats and amino acids with oxygen as part of their metabolism. This includes all plants, algae and animals and aerobic fungi and bacteria. In vertebrates, the carbon dioxide travels in the blood from the body's tissues to the skin (e.g., amphibians) or the gills (e.g., fish), from where it dissolves in the water, or to the lungs from where it is exhaled. During active photosynthesis, plants can absorb more carbon dioxide from the atmosphere than they release in respiration.
Biological role Carbon dioxide is an end product of cellular respiration in organisms that obtain energy by breaking down sugars fats and amino acids with oxygen as part of their metabolism This includes all plants algae and animals and aerobic fungi and bacteria In vertebrates the carbon dioxide travels in the blood from the body's tissues to the skin (eg amphibians) or the gills (eg fish) from where it dissolves in the water or to the lungs from where it is exhaled During active photosynthesis plants can absorb more carbon dioxide from the atmosphere than they release in respiration