Transport Systems

• Single circulation system (fish):

  • Two heart chambers
  • Blood absorbs oxygen in gills
  • Released in body cells then back to heart
• Double circulation system:

  • Four heart chambers
  • Blood passes through heart twice
  • Oxygenated in lungs, to heart, to body, back to heart
  • Advantage: delivers greater blood flow rate to tissues around the body as the heart pumps the oxygenated blood to it from the lungs