As biohazard removal specialist Aftermath explains, every human body undergoes the same stages of decay within a coffin or otherwise, barring exceptions like mummification (which involves removing the organs) and environmental factors (wet vs. cold environment, for example). In general, the body at one month vs. one year vs. 10 years is actually not too, too drastic. Most dramatic decay happens within the first month after death.

Non-cremated bodies pass through the same sets of hands within the "funeral service industry," as Ranker explains, which includes morticians, undertakers, and funeral arrangers. First, the recently deceased are passed along to autopsy techs, who may or may not extract all of a person's organs. After this, a sutured body is passed along to an embalmer, who undoes the stitches, replaces the organs, and injects a mixture of embalming fluid called "cavity fluid" into various vessels. A sealant is placed over the sutures to "prevent leakage" and sometimes plastic and powder are placed over the body as well. This is all before the mortician applies makeup, trims nails, and dresses the dead for burial.

During this entire time, the body undergoes decay that influences what it looks like 10 years down the line. Within three days after death, in fact, the body undergoes autolysis — self-digestion — when bodily enzymes eat their own cells. Blood pools in parts of the body closest to the ground. Rigor mortis occurs and skin gets loose. And the abdomen? Generally, it turns lime-green.

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