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HSC Biology

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Lesson 5, Topic 2
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Respiratory, Circulatory and Excretory Systems

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Similarities

  • All closed systems; involving ducts, tubes and containers
  • Controlled systems; all act to maintain homeostasis
    • Homeostasis: The ability to maintain internal stability in organisms
  • Each system transports fluids

Differences

Respiratory SystemCirculatory SystemExcretory System
– Below pump
– Involves air/fluid
– Transports gas
– Exchanges gas
– Situated in the upper body
– Involves pump
– Involves fluid plasma
– Transports cells
– Exchanges nutrients
– Situated throughout the body
– Pressure
– Involves fluid (urea)
– Situated in the lower body
– Sweat