Topic: Body Transport System Subtopic: Diseases of the transport system
What are varicose veins?
Answer: Varicose veins are caused when the valves of the vein does not work properly. This causes whens to swell up.
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- Which harmful chemical is black in color?
- Which blood vessel carries blood and where?
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- How is food absorbed?
- How much is life of red blood cell?
- What is digestive system?