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:
Why Pensions are Important: Sources. 1  The average monthly Social Security benefit paid to retired workers in 2016 is $1,350.64, or $16,207.68 a year. The average monthly Social Security benefit paid to widows & widowers is $1,294.04, or $15,528.48 per year. 2  The federal minimum wage is $7.25 per hour.