What is meant by peristalsis? What is the direction of normal peristalsis? [2 MARKS]
Each point: 1 Mark
1. Peristalsis is a series of wave-like muscle contractions that moves food to different processing stations in the digestive tract.
2. The process of peristalsis begins in the oesophagus when a bolus of food is swallowed and moves till the anus.