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The first finger (thumb) is labeled FRESH and it says:
Blood no longer pumped through the body, drains to lower parts of body under gravity, creating blush-purple discoloration, creates pale appearance in some places and darker in others. Shortly after death, muscular tissues become rigid (rigor mortis).
From death, the body loses heat to surrounding environment, heart stops and there is a release of cellular enzymes that start the breakdown of surrounding cells/tissues. Visible changes are limited during the "fresh stage", but autolysis causes blisters on the skin.
Accumulation of gases causes bloated appearance, and natural liquids and liquifying tissues become frothy. Pressure of gases within the body causes fluids to escape from holes (nose, mouth, and anus). Gas pressure causes rupturing of the skin, and maggots hatch/feed on tissues.
Maggot activity causes skin to slip and hair to detach from skin. Feeding and gases creates holes in the skin. Ruptures allow in oxygen for development of the fly larvae/aerobic microorganisms.
Greatest mass loss- feeding of maggots and the purging of decomposition fluids into environment and the fluids accumulate around body (CDI).
Liquefaction/disintegration is apparent and there are strong smells.
The end of active decay is after the maggots leave. Decomposition is slowest underground- especially in clay or other solid substances that prevent air from reaching the body because most bacteria need oxygen to live.
Insect activity is significantly reduced during this stage. The CDI surrounding the carcass will increase soil carbon and nutrients (phosphorous, potassium, calcium, and magnesium). There are changes in pH, and significant increase in soil nitrogen.
Plant growth around the CDI may occur.
Only dry skin, cartilage, and bones remain (will become dry and bleached if exposed to the elements).
If all soft tissue is removed from the cadaver, it is completely skeletonized, and if only portions of the bones are exposed, it is partially skeletonized.