Aside from being the bottom end of your gastrointestinal tract, and a type of punctuation mark, a colon is also the unit of currency in Costa Rica. 1 colon (C) = 100 centimos.
As of 26th December, 2000, 1 United States Dollar (US$1) is approximately equal to 318 Costa Rica Colon (CRC).
Anatomically, the colon is separated into several parts - in order they are: the caecum, ascending colon, transverse colon and sigmoid colon. The rectum is continuous with the sigmoid colon and the anus is just the end of the rectum that opens out to the outside world.