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.
Livor mortis. Cadaveric Lividity; postmortem, intravascular, red-blue discoloration resulting from hypostasis of blood; the change that occurs in the latter parts of the death process, postmortem physical change, gravitational pull of blood.adium (red discoloration), methylene blue (blue discoloration), sulfa (yellow discolorations), atabrine (brown discoloration). Blood discoloration such as ecchymosis, purpura, results from the breakdown of capillaries by the drugs, often capillaries are fragile and bruising occurs easily.