An octopus begins it's digestion by breaking it's preys shell with it's beak or tentacles. It then takes a bite out of the meat. After that, the food enters the buccal mass where the food is grinded by the radula. The food moves from the buccal mass into the crop through the esophagus. The food is digested there a little and then moves into the stomach where even more digestion takes place. Next, the food moves into the caecum and intestines where digestion and absorption takes place. Lastly, undigested food is removed by the anus.