Determining Time of Death - Decomposition

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  • Created by: Sdarby
  • Created on: 01-11-16 17:03
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  • Decomposition
    • After death - tissues start to break down due to enzyme action
    • Autolysis is first to occur - body's own enzymes from digestive tract and lysosomes break down cells
    • Bacteria from the gut and gaseous exchange system rapidly invade the tissues
      • Releases enzymes that result in decomposition
    • Loss of oxygen in tissues is optimum for growth of anaerobic bacteria
    • Environment temperature
      • major influence on rate of decomposition
      • Low temperatures - slower process
      • Warm temperatures - speed up process
      • Optimum temperature 21°C - 38°C
      • Intense heat denatures enzymes involved in autolysis ? delays the start of decay
    • Injuries allow entry of bacteria that can aid the process

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