the lungs 2.0 / 5 based on 1 rating ? BiologyCells, tissues and organsGCSEAQA Created by: KIM JONG UMCreated on: 05-04-13 11:24 what is the job of an exchange surface? for large complex organisms to obtain all of the food and oxygen they need. 1 of 8 what makes an exchange surface efficiant? large surface area, thin walls or a short diffusion path, and an efficiant transport system helps. 2 of 8 the lungs are ventilated to...? maintain a steep diffusion gradient 3 of 8 which structures increase the surface are of the lungs? the alveoli 4 of 8 how does oxygen move into blood? diffusion 5 of 8 how does carbon dioxide move out of the blood? diffusion again 6 of 8 which muscles contract when you breathe in? intercostal muscles and diaphram 7 of 8 what happens to the diaphram when you breathe out? it becomes domed 8 of 8
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