Question

In people who stand for long periods, blood tends to pool in the lower limbs and this may result in varicose veins. What causes the varicose veins?

O A ruptured aneurysm in a vein
• Failure of the lymphatic valves
• Failure of the venous valves
• An aneurysm or weak point in a vein
O An aneurysm or weak point in an artery

Answer 1

[AI-generated answer — Bot]

• Failure of the venous valves.

Answer 2

[AI-generated answer — Step-by-Step Bot]

The cause of varicose veins is the failure of the venous valves. When these valves don't function properly, they allow blood to flow backward and pool in the lower limbs, leading to the development of varicose veins. A ruptured aneurysm in a vein, failure of the lymphatic valves, or an aneurysm or weak point in an artery are not the primary causes of varicose veins.