Once a body is placed in a sealed casket, the gases from decomposing cannot escape anymore. As the pressure increases, the casket becomes like an overblown balloon. However, it's not going to explode like one. But it can spill out unpleasant fluids and gasses inside the casket.
Increasing pressure forces the body's fluids and liquefied organs out of any available orifice. Eyeballs can be dislodged and bodies have even been known to explode.
However, on average, a body buried within a typical coffin usually starts to break down within a year, but takes up to a decade to fully decompose, leaving only the skeleton, Daniel Wescott, director of the Forensic Anthropology Center at Texas State University, told Live Science.
After 1 month, the liquefaction process commences. During this stage the body loses the most mass. The muscles, organs and skin are liquefied, with the cadaver's bones, cartilage and hair remaining at the end of this process.
24-72 hours after death — the internal organs decompose. 3-5 days after death — the body starts to bloat and blood-containing foam leaks from the mouth and nose. 8-10 days after death — the body turns from green to red as the blood decomposes and the organs in the abdomen accumulate gas.
The first visible change to the body—occurring 15 to 20 minutes after death—is pallor mortis, in which the body begins to pale. Pallor mortis occurs because blood stops moving through the capillaries, the smallest of the body's blood vessels.
We think this is an urban legend. We've witnessed many cremations and never heard a scream. But then again, cremation retorts aren't silent either. Now, bodies do make all kinds of gnarly noises.
After two weeks, the body starts to bloat and change its color to red after the blood present in the body starts to decompose. Once the corpse surpasses the fourth week, you can witness liquefaction in the rest of the remains. The teeth and nails also begin to fall during this time frame.
Seeing a body after one year
If you were able to view a body after one year of burial, you may see as little as the skeleton laid to rest in the soil or as much as the body still recognizable with all the clothes intact.
By 50 years in, your tissues will have liquefied and disappeared, leaving behind mummified skin and tendons. Eventually these too will disintegrate, and after 80 years in that coffin, your bones will crack as the soft collagen inside them deteriorates, leaving nothing but the brittle mineral frame behind.
It is a common practice to cover the legs as there is swelling in the feet and shoes don't fit. As part of funeral care, the body is dressed and preserved, with the prime focus on the face. Post embalming, bodies are often placed without shoes; hence covering the legs is the way to offer a dignified funeral.
A body may be different in death to life because:
a mortician or funeral director has changed a body's appearance through clothing, or hair arrangement, or cosmetics. Such “dressing” of the body may be very different to how the person in life would have done it. the body smells different.
As the blood pools, patches appear on the skin within 30 minutes of death. About two to four hours postmortem, these patches join up, creating large dark purplish areas towards the bottom of the body and lightening the skin elsewhere. This may be less apparent on darker skin. This process is called livor mortis.
Does the skull burst during cremation? The skull does not burst during cremation. The skull will become fragile and crumble. This gives the illusion of bursting.
The body then starts to putrefy; soft tissues break down into a liquid and microbes ferment the body's sugars, releasing gases like methane, hydrogen sulphide and ammonia in the process. These gases can build up inside a decomposing corpse and sometimes, if the pressure becomes too high, they can rupture the stomach.
Generally speaking, a body takes 10 or 15 years to decompose to a skeleton. Some of the old Victorian graves hold families of up to eight people. As those coffins decompose, the remains will gradually sink to the bottom of the grave and merge.
In a temperate climate, it usually requires three weeks to several years for a body to completely decompose into a skeleton, depending on factors such as temperature, humidity, presence of insects, and submergence in a substrate such as water.
An open casket funeral typically has to take place within a few days or a week after the person's death. If the funeral is not going to take place for a longer period of time, then the body may not be able to be preserved well enough to host an open casket funeral.
To Protect the Corpse from Being Stolen. Snatching dead bodies was common in many parts of England and Scotland in the early 1800s. Therefore, graves were always dug six feet deep to prevent body snatchers from gaining access to the buried remains.
In a hundred years, the last of your bones will have collapsed into dust, and only the most durable part of your body, such as teeth, grave wax and some nylon threads.
Setting the features is a mortuary term for the closing of the eyes and the mouth of a deceased person such that the cadaver is presentable as being in a state of rest and repose, and thus more suitable for viewing.
Technically, no. The cremation chamber is essentially “locked” from the outside. Not locked with a padlock or a combination, but secured so if something happened and the chamber fell the body wouldn't roll out. Think of the body as a guitar in a guitar case.
For family members who are concerned they will not receive their loved one after cremation, the attended cremation is an option. They are able to spend time with their loved one and then see them enter the cremation chamber.