Respiration and gas exchange for N(A)-Level Science (Biology): aerobic and anaerobic respiration, the human breathing system, and gas exchange in the alveoli

An N(A)-Level Science (Biology) module overview of respiration and gas exchange. Aerobic and anaerobic respiration and the energy each releases, the parts of the human breathing system and how breathing happens, and how gas exchange in the alveoli is adapted for fast diffusion, with links to every dot point.