3.3.1 identify the parts of the digestive system and state their functions.
Structure of the digestive system in humans.
- review topics on digestion of humans from Primary 6.
- observe and identify the parts of the alimentary canal of humans from models and charts
NOTE: A dissected mammal e.g. rabbit, rat, showing the alimentary canal may be provided.
- review topics on digestion of humans from Primary 6.
- observe and identify the parts of the alimentary canal of humans from models and charts
NOTE: A dissected mammal e.g. rabbit, rat, showing the alimentary canal may be provided.
Explain the changes that take place when a meal of kenkey and fried fish passes through the alimentary canal.
3.3.2 compare the digestive systems of Monogastrics and Ruminants.
- draw and label the digestive systems of humans, chicken and ruminant
- compare the digestive systems of monogastrics and ruminants.
- compare the digestive systems of monogastrics and ruminants.
- state the functions of the parts of the digestive systems of the animals
Teacher to display charts/specimens of digestive system of humans, chicken and ruminant.
Pupils to tabulate the similarities and differences in the digestive tracts of monogastrics and ruminants.
3.3.3 describe the changes that occur to different food substances as they pass through the alimentary canal.
Digestion of food substances.
- discuss the processes of digestion in monogastrics and ruminants and note the differences.
- discuss the changes that occur to different types of food substances (carbohydrates, proteins, fats and oils) as they pass through the regions of the alimentary canal.
- demonstrate the action of saliva on cooked starch solution, record and discuss their observations.
- discuss the changes that occur to different types of food substances (carbohydrates, proteins, fats and oils) as they pass through the regions of the alimentary canal.
- demonstrate the action of saliva on cooked starch solution, record and discuss their observations.
NOTE: The term “enzyme” should be introduced. Only general names of digestive enzymes e.g. amylases, lipases, proteases required
- mention the end products of digestion.
- mention the end products of digestion.
3.3.4 describe how undigested food substances are eliminated from
the body.
the body.
Ejection of undigested food substances through the anus.
discuss how undigested food substances are removed from the body.
discuss how undigested food substances are removed from the body.
3.3.5 explain the absorption of end-products of digestion in animals.
Absorption of end products of digestion.
Uses of end-products of Digestion.
Causes of indigestion.
Effects of indigestion in animals.
Uses of end-products of Digestion.
Causes of indigestion.
Effects of indigestion in animals.
- discuss how undigested food substances are removed from the body
- discuss the absorption of digested food substances into the blood
- discuss the absorption of digested food substances into the blood
NOTE: Functions of the liver should be mentioned.
- discuss how the end-products of digestion are used in the body
- discuss causes of indigestion.
- discuss the effects of indigestion on the body.
- discuss causes of indigestion.
- discuss the effects of indigestion on the body.
What are the end products of digestion of protein and starch?
State three functions of the liver.
State three functions of the liver.
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