Population density shows how cramped or spread out inhabitants are. Cities with high population densities can be considered overpopulated, but the extent to which this is the case depends on factors like quality of housing and infrastructure and access to resources. Source: Wikipedia, 2017.
Livor mortis on the posterior aspects of the body is caused by settling of the blood because of gravity when the body is in a supine position. As the postmortem interval lengthens, Tardieu spots develop in areas of lividity, such as this individual's shoulder area, as decomposing capillaries rupture.
Rigor mortis occurs because the muscles in the corpse contract.  This contraction occurs because the calcium ions that are stored in  the muscles diffuses and causes the myo â¦ sin and actin proteins to  activate, but not release. Don Dfoofnik. 1,118,932 Contributions.