The immune system has four main functions: 1  Protection against foreign microorganisms such as bacteria, viruses, parasites, and fungi. 2  Homeostasis (body equilibrium) through the removal of worn out or dead cells. 3  Surveillance and removal of mutant cells. 4  Regulation through increasing and suppressing immune response.
In 2001, Jackson entered the Women's National Basketball Association (WNBA) draft and was selected by the Seattle Storm, which viewed Jackson as a franchise player. She has won two WNBA titles with the Storm, in 2004 and 2011, the latter also earning Jackson the WNBA Finals Most Valuable Player Award.
Jackson is the county seat of Madison County, Tennessee. Located 70 miles (110 km) east of Memphis, it is a regional center of trade for West Tennessee. Its total population was 65,211 at the 2010 census and 67,265 in the 2012 Census estimate.[5]