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Life Functions or Processes

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Life Functions or Processes Life Functions or Processes 1, Nutrition: the obtaining & processing of materials by an organism for its use (a) ingestion food intake ... – PowerPoint PPT presentation

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Title: Life Functions or Processes


1
Life Functions or Processes
2
Life Functions or Processes
  • 1, Nutrition the obtaining processing of
    materials by an organism for its use
  • (a) ingestion food intake by an organism
  • (b) digestion breakdown of complex foods to
    simpler foods by an organism

3
Life Functions or Processes
  • 2. Transport Circulation distribution of
    materials within an organism
  • 3. Respiration process used by an organism to
    release energy from their food.
  • Ex. Oxygen glucose yields carbon dioxide
    water ENERGY
  • This energy is needed to maintain life.

4
Life Functions or Processes
  • 4. Synthesis combining simpler chemical
    substances to form more complex ones.
  • Ex. Starches from simple sugars
  • 5. Excretion the removal of cellular wastes
    products
  • 6. Regulation (coordination) the control of
    various activities of an organism.

5
Life Functions or Processes
  • 7. Growth increase in living matter by
    increasing cell size or cell number
  • 8. Reproduction ability of organisms to form
    more of its own kind
  • (not needed for an organisms survival but
    necessary for the survival of the species)
  • 9. Immunity the ability of an organism to resist
    disease causing organisms and to fight invaders.

6
Life Functions or Processes
  • Metabolism the sum total of all life processes
    needed to sustain life
  • Homeostasis the maintenance of internal stable
    environment by an organism ( a steady state)
  • A disruption in any organism's system will
    result in a corresponding disruption of
    homeostasis
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