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Wednesday, September 8, 2010

Human Cadaver (All attributed to visibility of man)

A cadaver, corpse or lich is a dead human body. The Latin term cadaver is normally used for a body in medical training or research.


The various stages of decomposition can help determine how long a body has been dead.
The first stage is self digestion, and is where the body eats itself, also known as autolysis. This happens when the cells break down the body into elements the cells can eat; this creates a liquid that gets between the layers of skin and makes the skin peel off. During this stage, flies (when present) start to lay eggs in the openings of the body: eyes, nostrils, mouth, ears, open wounds, and other orifices. Hatched larvae (maggots) of blowflies subsequently get under the skin and start to eat the body.
The second stage of decomposition is bloating; bacteria in the gut begin to break down the tissues of the body, releasing gas that accumulates in the intestines, which becomes trapped due to the early collapse of the small intestine. This bloating occurs largely in the abdomen, and sometimes in the mouth and genitals. The tongue may swell and the penis may become hard and long. This usually happens in about the second week of decomposition. Gas accumulation and bloating will continue until the body is decomposed sufficiently for the gas to escape.
The third stage is putrefaction. It is the last and longest stage. Putrefaction is where the larger structures of the body break down, and tissues liquefy. The digestive organs, the brain, and lungs are the first to disintegrate. Under normal conditions, the organs are unidentifiable after three weeks. The muscles can be eaten by bacteria or devoured by carnivorous animals. Eventually, sometimes after several years, all that remains is the skeleton.

When a corpse is buried, the body will decompose by the actions of anaerobic bacteria. In many countries, corpses buried in coffins are embalmed. An embalmer may clean and shave the face, fill the eye sockets with cotton to make them appear full, and suture the jaw together to keep it from hanging open. Embalming fluid is then pumped into the body via an artery (commonly carotid, or femoral). This rehydrates the tissues and severely reduces the pace of decomposition.
Embalming is used to preserve the corpse temporarily, but may last for years. In some countries, such as the United States and Japan, make-up is applied to the corpse to prepare the body for public presentation. The corpse is then ready to go into the coffin. The embalmers then lower the corpse into the coffin, and then lower the coffin into the grave.

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