Summary questions 1. What is the role of the digestive system in the human body?
2. Copy and complete the sentences.
There are five stages of human nutrition. ____________ is the taking in of food to the mouth. Once food is in the mouth, it starts to be ____________, both physically and chemically. When the food is broken down into small enough pieces, it is ____________ into the blood and carried to the cells. The digested food enters the cells – this is called ____________. Any undigested food is released from the body – this is called ____________.
3. Explain the difference between physical and chemical digestion. 4. Copy and complete the following table:
Type of tooth Incisor Canine
Pre-molar Molar
5. Name the parts of the digestive system labelled A, B and C. Description
Narrow, sharp teeth at the front of the mouth, similar to chisels
Pointed teeth, often called ‘eye teeth’
Crushing and grinding food Crushing and grinding food
Function
A
B
C
)Fig. 6.6
6. Copy and complete the following table: Enzyme
Amylase Maltase
Where it acts Small intestine
7. Distinguish between the roles of the small intestine and large intestine. 8. List three functions of the liver.
Elements of Science 55 Breaks down Starch Glucose Broken into