Anatomy & Physiology › Section A · Introduction to the human body › Topic A.2

Functions and requirements of human life

A living body does things that a statue of the same shape never could: it builds, breaks down, senses, moves, grows and reproduces. To keep doing them it needs four things from its surroundings, and each comes only within a narrow range.

In this topic

  • What a living body does
  • Organisation: keeping compartments separate
  • Metabolism: building up and breaking down
  • Responsiveness and movement
  • Development and reproduction
  • Worked example: naming the function
  • Requirements: oxygen and nutrients
  • Requirement: a narrow range of temperature
  • Requirement: a narrow range of pressure
  • Worked example: oxygen at altitude
  • Common mistakes to avoid
  • Key takeaways

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