Читать книгу King's Applied Anatomy of the Abdomen and Pelvis of Domestic Mammals - Geoff Skerritt - Страница 38

To facilitate the action of enzymes upon the food taken into the digestive tract, it is necessary that the food be reduced to a soft pulp known as chyme. This is achieved largely by two types of contractile movement of the small intestines: (i) segmenting movements, which are single non‐travelling constrictions of the muscular wall and have the effect of churning and mixing the food; and (ii) pendular movements that involve primary contractions of the longitudinal muscle and that induce marked shortening of individual loops of the intestines and consequently shaking the contained chyme from one end of the loop to another.