AQA GCSE Physical Education · 8582
Paper 1
Widening of a blood vessel's lumen as muscle in its wall relaxes, increasing blood flow through it.
Revise: Blood vesselsWhen this muscle relaxes, the lumen widens. This is vasodilation, which increases blood flow to working muscles and delivers more oxygen and glucose.
- Revise: Immediate effects of exercise
The widening of blood vessels. During exercise, vessels supplying the skin widen, allowing more blood to flow near the surface and helping the body lose heat.