How are the nutrients carbohydrates, proteins, vitamins, iron and calcium of spaghetti bolognese digested?
9th March 2000 Digestion is a two-fold process involving the physical breakdown of food aggregates followed by chemical breakdown. The movement of the spaghetti bolognese through the digestive tract is carried out by series of muscular contractions. Physical Digestion The delightful smell and taste of the food together with the chewing activity stimulate the production of saliva. Physical digestion begins in the mouth where the voluntary action of chewing breaks down the food to form boluses that can be readily swallowed. Once swallowing has been initiated voluntarily, involuntary peristaltic waves propel the food down the oesophagus and into stomach, where it is churned and mixed with the gastric juices. This process continues the physical separation of the food which began in the mouth, and may continue for up to up to four hours. During this process the food is changed from the swallowed boluses into a semi-liquid substance called chyme (food mixed with gastric secretions). Chyme le
