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 System | Circulatory System | Excretory 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 |