Why do we inhale oxygen and exhale carbon dioxide? originally appeared on Quora: the place to gain and share knowledge, empowering people to learn from others and better understand the world. Answer ...

Knowledge of carbon exchange between the atmosphere, land and the oceans is important, given that the terrestrial and marine environments are currently absorbing about half of the carbon dioxide that ...

Respiration is a chemical reaction that happens in all living cells, including plant cells and animal cells. It is the way that energy is released from glucose so that all the other chemical processes ...

OXYGEN enriched with respect to 18 O has been used to solve the problem of how far oxygen, expired by an animal in the form of carbon dioxide, is identical with that inspired as molecular oxygen.