47. (a) What is the function of the respiratory system?
(2) What are the major organs of respiratory system in man for humans)?
(c) Draw a labelled diagram of the human respiratory system
48. (a) Explain how, the air we breathe in gets cleaned while passing through the nasal
(b) Why do the walls of trachea not collapse when there is less air in it?
(c) How are oxygen and carbon dioxide exchanged in our body during respiration?
(2) How are lungs designed in human beings to maximise the exchange of gases?
49. (a) Give the main points of difference between respiration in plants and respiration in animals.
(b) Describe the exchange of gases which takes place in the leaves of a plant (a) during daytime, and 014
night
(c) Which contains more carbon dixoide : exhaled air or inhaled airWhy?
50. (a) "Respiration is a vital function of the body". Justify this statement.
(b) What is the main difference between aerobic respiration and anaerobic respiration ? Give one example
each
(C) What type of repiration takes place (1) in yeast, and (ii) in humans?
51. (a) Why is diffusion insufficient to meet the oxygen requirements of large multicellular organisms like
humans ?
(b) What type of arrangement exists in the bodies of large animals to meet their oxygen requirements adequately
Answers
Answer:
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