Corpses bleed because there is still blood in the body that builds up and as the body decomposes the blood is then released through the skin breaking down.
After death a persons blood generally clots slowly and remains clotted for several days.
In some cases, however, fibrin and fibrinogen disappears from blood in a comparatively short time and the blood is found to be fluid and incoagulable soon after death.
A decomposing body will typically have a smell of rotting meat with fruity undertones.
Between 24-72 hours after death the internal organs decompose.
And 3-5 days after death the body starts to bloat and blood containing foam leaks from the mouth and nose.
Then 8-10 days after death the body turns from green to red as the blood decomposes and the organs in the abdomen accumulate gas.
A corpse generally progresses through five stages of decomposition—fresh, bloat (autolysis), active decay (putrefaction), advanced decay and skeletonisation.
8-10 days postmortem: the body turns from green to red as blood decomposes and gases accumulate.
2+ weeks postmortem: teeth and nails fall out.
1+ month postmortem: the corpse begins to liquefy into a dark sludge.
Within minutes to a few hours after death, a condition known as rigor mortis sets in.
This occurs when calcium builds up in your muscles and causes your limbs to go completely stiff.
Your muscles start to degrade after a day or two, so then you become your bendable, pliable self again.
The skeleton and teeth are much more robust.
Although they undergo a number of subtle changes after death, they can remain intact for many years.
During a person's lifetime, their skeleton is a dynamic living record that is altered both in its shape and chemistry by diet, the environment and daily activities.
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.