Food and drink is taken into the mouth in a process called ____. In the mouth, the teeth and tongue ____ the food by chewing and grinding. This is called ____ and makes the food easier to swallow. The ____ release saliva which ____ amylase. Amylase is an ____ that breaks down ____ into maltose. The food moves down the oesophagus due to the ____ in a process called peristalsis. When food reaches the stomach, it is mixed with ____ which has a low pH (about pH2) and kills any ____ in the food. The stomach also ____ a protease enzyme called pepsin which starts to digest ____. Proteins are broken down into ____. From the stomach, food enters the ____. The first part of the small intestine is called the duodenum. In the duodenum of the small intestine, ____ that have been made in the ____ are added to the food. The enzymes produced in the pancreas are called ____, amylase and a protease called trypsin. Enzymes are ____ that break down the ____ molecules into ____ molecules in the small intestine in a process called ____. The small, soluble molecules are absorbed across the walls of the small intestine into the blood. This happens in a part of the small intestine called the ileum. Lots of water is also absorbed into the bloodstream in the ileum of the small intestine. Undigested food then travels into the large ____. In the colon of the large intestine, some water is also ____ into the blood. This makes the ____ more solid. Faeces moves along in the process of ____ (contraction of muscles). The faeces is stored in the ____ until the person feels the need to poo. When they do, the faeces comes out the anus in a process called ____. The liver is also ____ in digestion but food ____ travel through it. The liver ____ a substance called bile that helps ____ break down lipids. Bile is ____ in the gallbladder and ____ into the small intestine.

Digestive System

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