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  1. Introduction to Science | Week 1
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  2. Family Health | Week 2
    8 Topics
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  3. Family Health (Sanitation) | Week 3
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  4. Family Health (Nutrition) | Week 4
    8 Topics
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  5. Drug and Substance Abuse | Week 5
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  6. Environmental Pollution: Air Pollution | Week 6
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  7. Soil pollution | Week 7
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  8. Water Pollution | Week 8
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Topic Content:

  • Definition of Deficiency Diseases
  • Causes and Symptoms of Deficiency Diseases
  • Evaluation Questions

What are Deficiency Diseases?

Deficiency diseases refer to those diseases which are caused by a lack of, or shortage of specific nutrients, in the meals we take. They are disorders caused by a lack of specific essential substances such as vitamins, minerals, or amino acids. 

More broadly, the term applies to conditions in which the important substances are present but not absorbed, or in which the organism fails to produce a natural and essential substance. Diseases such as beriberi, scurvy, pellagra, and rickets are caused by a lack of particular vitamins, and recovery is dramatically prompt when adequate quantities of the vitamins are supplied in the diet. 

Deficiency Diseases | Causes and Symptoms:

Below are some deficiency diseases, their causes, and symptoms;


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  1. 1)the six classes of food are
    Fats and oil
    Mineral salt
    Vitamin and
    2) Balance diet is a diet that contains all the classes of food in the right proportion
    3) functions carbohydrates:they are energy giving food
    Functions of Proteins:They are body building food and repair worn out tissues
    Functions of Fats and oil: They provide energy , protection and support for cell

  2. List the six classes of food
    1. Carbohydrate
    2. Protein
    3. fats and oil
    4. vitamins
    5. minerals
    6. water
    Balance diet is a meal that contain the six classes of food in the right proportion.
    Carbohydrate: they are energy giving foods.
    Protein: they build up and repair the worn out body cells
    Fats and oil: they protect and support the cells

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