Blood vessels

• What is the structure of the arteries?

  • Thick muscle layer
  • Thick elastic layer
  • No valves
• What is the structure of arterioles?

  • Thick muscle layer
  • Thin elastic layer
• What are the structure of veins?

  • Thin muscle layer
  • Thin elastic layee
  • Wide lumen
  • Valves
• What is the structure of the capillaries?

  • One cell thick
  • Numerous and highly branched
  • Narrow lumen