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(a) What is the function of the respiratory system ? 

(b) What are the major organs of respiratory system in man (or humans) ?

(c) Draw a labelled diagram of the human respiratory system.

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(a) The function of respiratory system is to breathe in oxygen for respiration (producing energy from food), and to breathe out carbon dioxide produced by respiration. 

(b) The major organs of respiratory system in human beings are: 

(i) Nose 

(ii) Nasal Passage 

(iii) Trachea 

(iv) Bronchi 

(v) Lungs and 

(vi) diaphragm.

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