A blister is a bubble of fluid under the skin. The clear, watery liquid inside a blister is called serum. It leaks in from neighboring tissues as a reaction to injured skin. If the blister remains unopened, serum can provide natural protection for the skin beneath it. Small blisters are called vesicles. Those larger than half an inch are called bullae. A blood blister is filled with blood, rather than serum.
With 15,145 people, Cullman is the 41st most populated city in the state of Alabama out of 578 cities. But watch out, Cullman, because Alexander City with 14,849 people and Scottsboro with 14,748 people are right behind you.
According to the U.S. Census Bureau, the population of Pickens County was 19,746 in 2010. Of that total, 56.3 percent of respondents identified themselves as white, 41.6percent as African American, 1.6 percent as Hispanic, 1.2 percent as two or more races, 0.2 percent as Asian, and 0.1 as Native American. Pickens County ranked 49th in population among Alabama's 67 counties in 2000. The largest city is Aliceville, with an estimated population of 2.486. Other significant population centers included Reform, Gordo, Memphis, Carrollton, and Pickensville.