Biology GCSE
Gas exchange
What Gas exchange means in Biology GCSE, as defined for AQA.
Definitions of Gas exchange
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Reference: AQA
The process in the lungs where oxygen diffuses from the alveoli into the blood and carbon dioxide diffuses from the blood into the alveoli to be exhaled.
Oxygen diffuses from the air in the lungs into the blood, and carbon dioxide diffuses from the blood into the lungs.
The diffusion of oxygen and carbon dioxide between an organism and its environment, for example in the lungs.
Topics that use Gas exchange
- Diffusion (AQA GCSE)
- The heart and blood vessels (AQA GCSE)
Related terms
- Diffusion
- arteries
- Capillaries
- Capillary network
- Closed system
- Concentration gradient
- Concentration gradients
- Coordination of contraction
Using Gas exchange in the exam
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