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The Digestive System

The Digestive System. Ms. Wilson’s Third Grade class. For Teachers. AZ Health Standards. NET*S. AZ Technology Standards. Information Literacy . AZ Standards. COMPREHENSIVE HEALTH STANDARDS BY LEVEL: FOUNDATIONS (Grades 1-3) STANDARD 1

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The Digestive System

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  1. The Digestive System Ms. Wilson’s Third Grade class

  2. For Teachers AZ Health Standards NET*S AZ Technology Standards Information Literacy

  3. AZ Standards COMPREHENSIVE HEALTH STANDARDS BY LEVEL: FOUNDATIONS (Grades 1-3) STANDARD 1 Students comprehend concepts related to health promotion and disease prevention. 1CH-F3. Describe the basic structure and functions of the human body systems PO 1. Identify the parts of the digestive and circulatory system PO 2. Describe the functions of the digestive and circulatory systems

  4. AZ Technology Standards 1T-F3. Use developmentally appropriate technology resources to access information and communicate electronically See: Language Arts (VP-F), Mathematics (1M-F7) and Workplace Skills (7WP-F1) PO 1. Operate keyboard and other common input and output devices (including adaptive devices for special needs when necessary) a) Use device in response to software (e.g., point and click, arrow and enter/return keys)

  5. NET*S 2. Design and Develop Digital-Age Learning Experiences and Assessments Teachers design, develop, and evaluate authentic learning experiences and assessment incorporating contemporary tools and resources to maximize content learning in context and to develop the knowledge, skills, and attitudes identified in the NETS•S. Teachers: a. design or adapt relevant learning experiences that incorporate digital tools and resources to promote student learning and creativity.

  6. Information Literacy Information Literacy Standard 3: The student who is information literate uses information accurately and creatively. -Organizes information for practical application. -Integrates information into one’s own knowledge. -Applies information in critical thinking and problem solving. -Produces and communicates information and ideas in appropriate formats.

  7. Your Digestive System Start Finish

  8. The Mouth Digestion begins when your mouth produces saliva, or spit. When you eat, the saliva breaks down the chemicals in the food a bit, which helps make the food mushy and easy to swallow. Your tongue helps by pushing the food around while you chew with your teeth.

  9. Swallowing Food When you're ready to swallow, the tongue pushes a tiny bit of mushed-up food toward the back of your throat and into the opening of your esophagus, the second part of the digestive tract. The esophagus is a muscular tube that is connected to the stomach. The muscles that surround the esophagus help to squeeze and push the food into the stomach.

  10. The Stomach Food sloshing in the stomach can last 3-4 hours The stomach is like a mixer, churning and mashing together all the small balls of food that came down the esophagus into smaller and smaller pieces. It does this with help from the strong muscles in the walls of the stomach and gastric juices that also come from the stomach's walls. In addition to breaking down food, gastric juices also help kill bacteria that might be in the eaten food.

  11. The Small Intestine The small intestine has the important job of breaking down the food mixture so your body can absorb all the nutrients it needs from food - vitamins, minerals, proteins, carbohydrates, and fats. Your food may spend as long as 4 hours in the small intestine and will become a very thin, watery mixture. The small intestine is a long tube that is about 1 1/2 inches around and if you stretched it out it would about 22 feet long!

  12. Breaking Down Food The small intestine can't break down food for its nutrients by itself - it gets help from three other parts of the digestive system. These parts are the pancreas, the liver, and the gallbladder. They are not part of the digestive tract itself, but they help out by sending different juices to the small intestine.

  13. Large Intestine Next the mostly-digested food is pushed into the large intestine. It's much wider and much drier. You find that the leftovers getting smaller, harder and drier as they're pushed through the tube. This is the place where water is extracted and recycled back into your body. Almost done! Food drying up and hanging out in the large intestine can last 18 hours to 2 days!

  14. Last Stop! The large intestine pushes the waste into the rectum, the very last stop on the digestive tract. The solid waste stays here until you are ready to go to the bathroom. That’s where food goes, From start to finish!

  15. Spit, drool, saliva… You’re correct! Do You Remember? • Where does digestion begin? The Mouth With Saliva The first stop may be the mouth, but digestion actually begins with saliva!

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