IB Biology HL C3.1.16 distinguishes involuntary enteric peristalsis from CNS-controlled swallowing and egestion. Practise how gut contractions move food along the digestive tract.
Fluids inside unicellular and multicellular organisms allow materials to be moved.
Outline how food is moved from the stomach to the large intestine.
by muscles (contracting);
peristalsis/waves of muscle contraction followed by relaxation;
longitudinal muscle pushes food along the intestine when it contracts;
circular muscle constricts the intestine to ensure movement only onwards/not back to stomach;
movement (from stomach to large intestine) via the small intestine/duodenum/ileum;