BI-1114
Arteries, veins and capillaries
Biology · Secondary 3 · Medium · Arteries, veins and capillaries
Why are varicose veins much less common in arteries than in veins?
- Blood in arteries is under high pressure and kept moving forward, so it does not accumulate.
- Arteries do not contain any blood cells, so they cannot swell.
- Arteries have more valves than veins, so backflow never occurs.
- Blood in arteries flows only by gravity, so it cannot pool.
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