Without the respiratory system you would not be able to release the energy from the food you eat. And without energy you will not be able to do a thing, not even sleep!
So now, let’s take a tour inside the human respiratory system. Can you name some parts of the respiratory system? Well, in the power point you will learn:
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What is human respiration?
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What are the organs that make up the respiratory system?
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What are the functions of the parts of the respiratory system?
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How can you explain the breathing process?
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What are the different types of Respiratory System Disorders?
Click the link for the slide show

You can learn more details at Wikipedia