The Takret Renth noted as for the reason he was preparing food on a cooking plate on a plasma manifold that the members of his species were unable to digest the Human food. (ENT: "The Catwalk") The gallbladder, a small organ that held bile from the liver until it was needed for digestion, was also part of the digestive system. A diagram of the Human torso depicting the location of the gallbladder was stored in the USS Enterprise's library computer database. This database was accessed by the Talosians in 2254. (TOS: "The Cage" )