"The human body...produce new cells...and eventually certain scavenger cells arrive to remove dead cells from the system. ...Macrophages remove dead cells essentially by eating them...Living cells become dead cells through two different processes. Many body cells are programmed to die at a prescribed time, through a process called apoptosis.... The other process for creating dead cells is called necrosis. Necrotic cell death usually occurs after a trauma or infection or other shock to the system....The body cannot function well with an overabundance of dead cells, so macrophages take on the mission of breaking down the excess. Once the macrophages and other immune system components have essentially digested the body's dead cells, the cells make their way through the bloodstream and eventually into the digestive system for final disposition. This means that the solid waste we call fecal matter is largely composed of dead cells sloughed off by the various organs and processed for elimination by macrophages." - http://www.wisegeek.com/how-does-the-human-body-eliminate-dead-cells.htm
forgive my paraphrasing on this next article the death of fat cells causes inflammation witch is characterized by and increase in plasma until the macrophages can do their work. http://www.ars.usda.gov/is/ar/archive/mar06/cells0306.htm