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Decomposition or rotting is the process by which tissues of a dead organism break down into simpler forms of matter. A dead body that is exposed to the open elements, such as water and air, will decompose more quickly and attract much more insect activity than a body that is buried or confined in special protective gear or artifacts.

Ultimately, the rate of bacterial decomposition acting on the tissue will depend upon the temperature of the surroundings. Colder temperatures decrease the rate of decomposition while warmer temperatures increase it.

Normal body temperature during life is 98.6 degrees F. After death, the body loses heat progressively until it equilibrates with that of the surrounding medium. The rate of this heat loss is approximately 1.5 degrees per hour until the environmental temperature is attained, then it remains stable. Obviously, this measure is greatly effected by location. A body in the snow in Minnesota in January and one in a Louisiana swamp in August will lose heat a widely divergent rates. These factors must be considered in any "estimate" of time of death.

The criminalist who processes the scene should take a body temperature and measure the temperature of the surrounding medium--air, water, snow, earth (if the body is buried). Ideally, the body temperature is taken rectally. Obviously, the sooner after death the body is found, the more accurately time of death can be assessed by this method. Once the body reaches ambient temperature, all bets are off.

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Q: What is the stage of Decomposition of a human body after 2 weeks in water?
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