Artery: Carry blood away from heart, Have a thin lumen., Have thick muscular walls, Blood at high pressure., Usually contain oxygenated blood., Capillary: Carry blood around tissues such as lungs and muscle., Have walls only one cell thick., Allow gas exchange to take place., Blood at very low pressure., Form networks to increase surface area., Vein: Carry blood to the heart, Have a wide lumen., Have thin walls., Blood at low pressure., Contain valves to prevent backflow.,

Y5 Blood Vessels

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