decomposition of human body notes this ppt contains graphic images. i put pictures on slides that do...
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Decomposition of Human BodyNotes
This ppt contains graphic images. I put pictures on slides that do not contain information so feel free to avert your eyes. Information is also graphic and can be disturbing.
5 stages of decomposition
•Initial decay
•Putrefaction
•Black putrefaction
•Butyric fermentation
•Dry decay
Initial Decay
•0-3 days after death•Bacteria in digestive tract start eating
intestines, break through and begin feeding on surrounding organs
•Individual cells break down, releasing cell contents and enzymes into body
Putrefaction
•4-10 days after death•Body will be bloated from build-up of
gases in body•Gases released by bacteria living in
intestines•Skin blisters•Build-up of fluids from ruptured cells and
intestines•Skin begins slipping
Putrefaction
Black Putrefaction
•10-20 days after death•Body begins to collapse and black
surfaces are exposed•Bloated body collapses and leaves a
flattened body•Large volume of body fluids drain from
body
Black Putrefaction
Butyric Fermentation
•20-50 days•Remaining flesh on body is removed and
body dries out•Cheesy smell (caused by butyric acid)•Surface of body in contact with ground
may mold as body ferments
Butyric Fermentation
Dry decay
•50-365 days after death•Body is dry and continues to decay very
slowly because of lack of moisture•Mostly reduced to hair and bones•Eventually the hair will disappear
Dry decay
Picture of lividity
Questions
•Answer on page 80•What factors do you think would speed
up/slow down the rate of decomposition?•How does the state of decomposition
assist scientists in determining time of death?
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