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Unit 7: The Body

Unit 7: The Body. 7.3 Stages of Decomposition. Stages of Decomposition. There are predictable stages of decomposition that all bodies will progress through. The rate of decomposition will vary depending on conditions such as heat, moisture, and scavengers. Stage 1: Autolysis. 0-4 Days

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Unit 7: The Body

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  1. Unit 7: The Body 7.3 Stages of Decomposition

  2. Stages of Decomposition • There are predictable stages of decomposition that all bodies will progress through. • The rate of decomposition will vary depending on conditions such as heat, moisture, and scavengers.

  3. Stage 1: Autolysis • 0-4 Days • CO2 in blood increases • pH decreases • Waste accumulates • Cells poisoned • Enzymes dissolve cells • Fluid Filled Blisters on skin • Skin Slippage

  4. Stage 2: Putrefaction/Bloating • 4-10 days • Destruction of soft tissue by bacteria • Skin greenish color • Methane/ammonia released • Odor

  5. Stage 3: Black Putrefaction • 10-20 days • Body collapses • Gases escape • Fluids drain • STRONG ODOR

  6. Stage 4: Butyric Fermentation • 20-50 days • Body drying out • Cheesy odor from butyric acid

  7. Stage 5: Dry Decay • 50 days – 1 year • Body almost dry • Slow rate of decay • May mummify depending on conditions

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