» Tapeworm is also an older name for a type of computer virus. Cestoda is the class of parasitic flatworms, commonly called tapeworms, that live in the digestive tract of vertebrates as adults and often in the bodies of various animals as juveniles. Overview Authors Craig and Ito, in Intestinal Cestodes describe the gut-dwelling worm as a segmented, band like (Cestoda) in its adult stage (Craig & Ito 2007:524). What occurs in tissues and organs of vertebrates or humans, is the growth of a cyst… (More on Tapeworm)