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 is diffusion?
- How does temperature affect rate of transpiration?
- What is cell sap?
- What makes heart sound like lub?
- What is an artificial pacemaker?
- Why is transpiration important?