Lesson 3 The digestive system The diagram shows

Lesson 3 – The digestive system The diagram shows the organs of the digestive system and how these organs are involved in digestion. Food doesn’t travel through all of these organs. Some of these organs either make or store substances to help with digestion. Use the information on the diagram and your knowledge of previous lessons to help you answer the questions.

Lesson 3 – Questions 1. Write down the order of the digestive organs that food travels through. 2. Where is protein digested in our body? 3. Imagine you ate a chicken sandwich that contained butter. What food groups would you have eating? 4. Write down the journey of the chicken sandwich. Include the pathway through the digestive system and where each food group is broken down. Finish at the large intestines. 5. Where is bile made and stored? 6. Write down the different parts in you books correctly matched up with the definition below.

Lesson 3 – answers 1. Mouth oesophagus stomach small intestine large intestine. 2. Protein is digested in the stomach and small intestine. 3. If you’d ate a chicken sandwich you’d have eaten starch (bread), protein (chicken) and fat (butter). 4. The chicken sandwich’s journey starts in the mouth where starch (bread) is broken down. Then the food is forced down the oesophagus into the stomach. In the stomach the protein (chicken) is broken down and then the food passes into the small intestine where fat is broken down (butter) and all the other food groups are broken down further too. 5. Bile is made in the liver and stored in the small intestine.

Lesson 3 – answers 6. Write down the different parts in you books correctly matched up with the definition below. Mouth Water is absorbed from the waste matter back into the blood stream here. Oesophagus Waste leaves the body here. Stomach Food is chewed and mixed with saliva. Small intestine Food travels from the mouth down to the stomach in this pipe. Large intestine Food is mixed with acid and broken down here. Anus The rest of the food is broken down and nutrients are absorbed.

Plenary – Name the organs of the digestive system 1. mouth 2. 3. 4. liver oesophagus stomach 5. 6. small intestine 7. 9. gall bladder 8. pancreas large intestine anus