Circulatory Systems

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  • Circulatory Systems
    • Open
      • Found in Insects
      • Features: large open chamber, no tubes
      • +ve: simple, few organs
      • -ve: inefficient for diffusion
    • Single Closed
      • Found in Fish
      • Features: heart with two chambers, tubes
      • +ve: simple, high pressure
      • -ve: less efficient for gas exchange
    • Double closed
      • Found in Birds and Mammals
      • Features: heart with 4 chambers, tubes
      • +ve: high & low pressure system
      • -ve: more tubes and effort


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