Descriptions of Pleural cavity. Pleural cavity: The space enclosed by the pleura, which is a thin layer of tissue that covers the lungs and lines the interior wall of the chest cavity. Source: National Institute of Health. Pleural cavity: the cavity in the thorax that contains the lungs.
These and other retirement income streams produced an average income of $31,742 for people age 65 and older in 2012, according to a recent AARP Public Policy Institute analysis of Census Bureau data. Here's how older Americans are paying their bills in retirement:
Gallup conducted several polls in the early 1990s and found that the average retirement age was 57 in both 1991 and 1993. From 2002 through 2012, the average hovered around 60. Over the past two years, the average age at which Americans report retiring has increased to 62.