Biology GCSE
Closed system
What Closed system means in Biology GCSE, as defined for AQA.
Definition of Closed system
Check what you remember
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Reference: AQA
A continuous network of tubes in which the three vessel types form a circuit: heart, arteries, capillaries, veins and back to the heart.
Topics that use Closed system
- The heart and blood vessels (AQA GCSE)
Related terms
- arteries
- Capillaries
- Capillary network
- Coordination of contraction
- Diffusion
- double circulatory system
- Electrical signalling in the heart
- Gas exchange
Using Closed system in the exam
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