giv 5 diferences betwen arteries, veins n capilaries.
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Arteries
Away from heart
Mainly carry oxygenated blood
High pressure
No valves
Thick outer wall (pumps a lot more blood)
Thick inner layer of muscle and elastic fibres
Narrow central tube-small lumen(where the blood flows through)
Capillaries
Wall only one cell thick-really thin -diffusion
smallest blood vessel
Veins
Blood into heart
Most carries de-oxygenated
Lower pressure
Valves
Thin outer walls
Thin inner layer
Wide central tube -large lumen
Away from heart
Mainly carry oxygenated blood
High pressure
No valves
Thick outer wall (pumps a lot more blood)
Thick inner layer of muscle and elastic fibres
Narrow central tube-small lumen(where the blood flows through)
Capillaries
Wall only one cell thick-really thin -diffusion
smallest blood vessel
Veins
Blood into heart
Most carries de-oxygenated
Lower pressure
Valves
Thin outer walls
Thin inner layer
Wide central tube -large lumen
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