Explore how the enteric nervous system coordinates involuntary smooth-muscle peristalsis while the CNS controls voluntary swallowing and egestion in IB Biology HL C3.1.16.
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;