veins, capillaries, arteries

• arteries

  carry blood away from the heart
• arteries

  carry oxygenated blood
• arteries

  have a thick layer of muscle
• arteries 


  small lumen
• arteries 


  blood flows at high pressure due to the action of the heart
• connect veins and arteries

  capillaries
• carry both oxygenated and deoxygenated blood

  capillaries
• very thin walls 


  capillaries
• tiny vessels in close contact to cells

  capillaries
• low blood pressure and slow speed to allow exchange of materials

  capillaries
• carry blood to the heart

  veins
• carry deoxygenated blood


  veins
• have valves to prevent back flow of blood 


  veins
• thin layer of muscle

  veins
• big lumen


  veins
• blood flows at low pressure

  veins