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What role do other human body systems, such as the digestive system, the integumentary system, and the respiratory system play in protection? Think back to the game or children’s book you designed in PBS. Provide an example for each system that demonstrates how a feature, substance, or action of that system helps keep you well.

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Respiratory system helps in breathing and it leads to exhalation of the gas carbon dioxide which is not required by the body. The integumentary system is the first line of defense and protects the body from invadig microbes, dust, and other harmful substances. The digestive system protects the body by enabling digestio of food and providing energy to sustain, further the toxic waste materials are also released during the process. 

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