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The respiratory and circulatory systems work together to provide cells with the oxygen
they need for cellular respiration. Cells also need glucose for cellular respiration. Glucose
is a simple sugar that comes from the food we eat. To get glucose from food, digestion
must occur. This process is carried out by the digestive system.
The principal lesson objectives are:
• Identify the organs and functions of the digestive system.
• Outline the roles of the mouth, esophagus, and stomach in digestion.
• Explain how digestion and absorption occur in the small intestine.
• List functions of the large intestine.
• Describe common diseases of the digestive system.
• Identify classes of nutrients and their functions in the human body.
• Explain how to use MyPyramid and food labels as tools for balanced eating