F.2 I.S.

gasous exchange:it means that we breath in oxygen and give out carbon dioxide.
respiration:the process of breaking down food with oxygen to release energy and carbon dioxide and water.

gaseous exchange係指oxygen同carbon dioxide係alevoli表面進行交換，即進入同離開血管到肺，係physical process

respiration係在cell內的mitochrondrion度發生，過程係會carbohydrate break down to release energy，為cell activity 提供energy，respiration 係biochemical process