Digestion: Muscular and mechanical movement

Deals with the muscular processes involved in the digestion of food. The film demonstrates mechanical and muscular processes of mastication and swallowing; peristalsis in the oesophagus, small intestine, and colour segmentation in the small intestine; contraction waves in the cardiac and pyloric regions of the stomach; absorption of food into the blood from the small intestine, and of water and salts from the colon.