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