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:
According to the Pension Rights Center, older adults get retirement income from the following sources: Social Security: 85 percent of people 65 and older get Social Security. The average Social Security income in 2014 was not quite $1,300, according to Smart Asset.