Appendicitis occurs when the appendix becomes blocked, often by stool, a foreign body, or cancer. Blockage may also occur from infection, since the appendix swells in response to any infection in the body.
A familial generation is a group of living beings constituting a single step in the line of descent from an ancestor. In developed nations the average familial generation length is in the high 20s and has even reached 30 years in some nations.
The Greatest Generation is just one of many generations that scholars have identified. The following is a list of 20th-century generations proposed by historians William Strauss and Neil Howe in their book, Generations: The History of America's Future, 1584-2069..