Topic: Body Transport System Subtopic: Arteries, veins and capillaries
What is vein?
Answer: Vein is a blood vessel with thin walls and broad lumen. Veins contain deoxygenated blood with low pressure, due to its low pressure there is a risk of backward flow of blood. To prevent this backward flow, vein have uni-directional valves which prevent blood from flowing back.
- What happens if excess lactic acid is produced?
- Why large molecules cannot absorb into blood?
- What are first symptoms of flu?
- What is faeces?
- What is transpiration?
- What is passive smoking?