AQA GCSE Physical Education · 8582
Paper 1
Revise: Blood vesselsTo compare them, distinguish the wall from the lumen: the wall surrounds the vessel, while the lumen is the hollow space through which blood flows.
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GCSE Physical Education · key term
The hollow space inside a blood vessel through which blood flows.
Used by AQA
Paper 1
Revise: Blood vesselsTo compare them, distinguish the wall from the lumen: the wall surrounds the vessel, while the lumen is the hollow space through which blood flows.
Distinguish lumen diameter from wall thickness. The lumen is the space inside the vessel, not its wall.
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