Blood vessels
- Created by: h8revising
- Created on: 26-04-21 13:57
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- Blood vessels
- Arteries
- Elastic fibres
- Allows stretching and contracting
- High blood pressure
- Narrow lumen
- Smooth endothelium
- Reduce friction
- Collagen in walls
- provide strength
- prevent too much stretching
- Peripheral arteries = furthest from heart
- Muscle fibres
- Away from heart
- Elastic fibres
- Veins
- Low blood pressure
- To heart
- Valves to prevent backflow
- Few elastic fibres
- Wide lumen
- Large veins between blocks of muscle
- Contraction of muscles squeezes blood along
- Collagen in walls
- provide strength
- prevents too much stretching
- Capillaries
- Small and branching
- Cells always near a capillary network
- Small diameter
- Opportunity of diffusion
- 1 cell thick
- Small and branching
- Arteries
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