The Blood Vessels
- Created by: errolshine
- Created on: 26-11-14 22:28
Other questions in this quiz
2. What are the features of veins?
- They have a large lumen and moderately thick walls but the blood is pumped at a lower pressure so they don't need to be thick. They have valves to keep the blood flowing in the same direction.
- They are large with tiny lumens. They have very very thick cell walls to allow for blood to be pumped at high pressures.
- hey have a huge lumen with a thin cell wall and valves to keep the blood flowing in the right direction.
3. What do arteries do?
- They carry blood away from the heart
- They carry blood to the heart
- They are involved in the exchange of materials between tissues.
4. What are an arteries walls like?
- They are fairly thin, but there is a larger lumen as the blood is pumped at a lower pressure so the wall doesn't have to be that thick.
- They are thick, containing layers of muscle to make them strong, which is needed because the blood in them is pumped at very high pressures.
- They are one cell thick, allowing for the exchange of substances to happen easily.
5. What are the features of capillaries?
- They have a huge lumen with a thin cell wall and valves to keep the blood flowing in the right direction.
- They are very tiny with a small lumen and have one cell thick permeable walls which increases the rate of diffusion by decreasing the distance over which it occurs.
- They are large with tiny lumens. They have very very thick cell walls to allow for blood to be pumped at high pressures.
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