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.
Unless those generations are only 6 years long, these verses indicate that humanity has been around much longer than 6,000 years. In most instances, a biblical generation is ~40 years long, 14 meaning that human beings have been around for at least 40,000 years.