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
1 answer
• Failure of the venous valves.
2 answers