sentence: Muscular movements pass the material down the tube.
sentences_before: It carries food through digestion and excretion. Into the tube come various digestive enzymes. Gut flora also help digestion.
sentences_after: The gut usually has an exit, the anus, by which the animal disposes of solid wastes. Some small animals have no anus and dispose of solid wastes by other means, for example through the mouth.
concept_name: muscular movement
headings: Alimentary canal
categories: Anatomy of the digestive system Animal anatomy