Page 3 - CH-8-8.1 HUMAN BODY
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digestion. Digestive system breaks the food we eat into smaller substances.

                   After digestion, food can be used for producing energy.








































                 Respiratory system is responsible for carrying oxygen from the air to the
                   bloodstream. Oxygen is necessary for human life.
























                 Nervous system performs the functions of thinking, smelling/seeing, tasting
                   etc.
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