The Digestive The Digestive SystemSystem

By: Jess Sequeira, Jordan By: Jess Sequeira, Jordan Ortiz-Pallen, Toni Gadar, Ortiz-Pallen, Toni Gadar,

Emily Brazis, and Mayreni Emily Brazis, and Mayreni SweisSweis

Everyone

What is the digestive What is the digestive system?system?

The system that breaks down food so The system that breaks down food so that it can be used by the bodythat it can be used by the body

One of the nine major organ systems One of the nine major organ systems

in the bodyin the body

Includes mouth, esophagus, Includes mouth, esophagus, stomach, small and large intestines, stomach, small and large intestines, rectum and anusrectum and anus

Jordan

Why is the digestive Why is the digestive system important?system important?

Changes food into nutrientsChanges food into nutrients

Absorbs and transports nutrientsAbsorbs and transports nutrients

Removes food wastes from the bodyRemoves food wastes from the body

Jordan

What you’ll learn about What you’ll learn about the digestive system.the digestive system.

Mechanical vs. chemical digestionMechanical vs. chemical digestion Organs of the digestive systemOrgans of the digestive system What happens in each organWhat happens in each organ How homeostasis is maintained in How homeostasis is maintained in

the digestive systemthe digestive system Role of bacteria in the digestive Role of bacteria in the digestive

systemsystem

Emily

Picture of the digestive Picture of the digestive systemsystem

http://www.carlson-art.com/lifescience/digestive-system-lg.jpgMayreni

Digestive System Digestive System Failures Failures

Loss of teethLoss of teeth Scleroderma of the esophagusScleroderma of the esophagus Stomach cancerStomach cancer GallstonesGallstones Pancreatic cancerPancreatic cancer Colon cancerColon cancer

Jess

The parts of the The parts of the digestion systemdigestion system

http://www.google.com/images?um=1&hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&tbs=isch%3A1&sa=1&q=digestive+system&aq=f&aqi=g10&aql=&oq=&gs_rfai=

Mayreni

Picture of the small Picture of the small intestineintestine

http://www.colorado.edu/intphys/Class/IPHY3430-200/image/21-2d.jpg Mayreni

Digestive System Digestive System VocabularyVocabulary

Digestion: mechanical and chemical Digestion: mechanical and chemical processes that breaks down food processes that breaks down food into smaller molecules so they can into smaller molecules so they can be used in the body’s cellsbe used in the body’s cells

Enzyme: molecules that speed up Enzyme: molecules that speed up the rate of chemical reactions in the the rate of chemical reactions in the bodybody

Toni

Digestive System Digestive System VocabularyVocabulary(Continued)(Continued)

Mechanical digestion: process that Mechanical digestion: process that occurs when food is chewed in the occurs when food is chewed in the mouth and churned in the stomachmouth and churned in the stomach

Chemical digestion: process that Chemical digestion: process that breaks down food into different smaller breaks down food into different smaller molecules so it can be absorbed by the molecules so it can be absorbed by the body’s cells; takes place in the mouth, body’s cells; takes place in the mouth, stomach, and small intestinestomach, and small intestine

Toni

Digestive System Digestive System VocabularyVocabulary(Continued)(Continued)

Saliva: watery enzyme containing fluid in Saliva: watery enzyme containing fluid in the mouth that is mixed during digestionthe mouth that is mixed during digestion

Peristalsis: wavelike muscular Peristalsis: wavelike muscular contractions that move food through the contractions that move food through the digestive systemdigestive system

Chyme: thin, watery product that is the Chyme: thin, watery product that is the result of digestionresult of digestion

Villi: fingerlike projections in the small Villi: fingerlike projections in the small intestine where nutrients are absorbed intestine where nutrients are absorbed into the blood stream into the blood stream

Toni

Test QuestionsTest Questions

1. Compare mechanical and chemical 1. Compare mechanical and chemical digestion.digestion.

2. Where does most digestion occur?2. Where does most digestion occur?

3. What product is made by bacteria 3. What product is made by bacteria in the large intestine?in the large intestine?

Everyone

Test Questions(Continued)

4. What continues to force the 4. What continues to force the remaining materials that haven’t remaining materials that haven’t been digested or absorbed slowly been digested or absorbed slowly into the large intestine?into the large intestine?

5. Food is processed in your digestive 5. Food is processed in your digestive system for the purpose of supplying system for the purpose of supplying your body with raw materials for your body with raw materials for _________._________.

Everyone

Test AnswersTest Answers

1. Mechanical digestion is a process that 1. Mechanical digestion is a process that occurs when food is chewed in the occurs when food is chewed in the mouth and churned in the stomach.mouth and churned in the stomach.

Chemical digestion is a process that Chemical digestion is a process that breaks down food into separate, smaller breaks down food into separate, smaller molecules so they can be absorbed into molecules so they can be absorbed into the body’s cells. the body’s cells.

2. Most digestion occurs in the 2. Most digestion occurs in the

duodenum.duodenum.Everyone

Test Answers(Continued)

3. Essential vitamins are produced in 3. Essential vitamins are produced in the large intestine.the large intestine.

4. Peristalsis pushes the remaining 4. Peristalsis pushes the remaining material into the large intestine.material into the large intestine.

5. metabolism5. metabolism

Everyone

Fun factsFun facts

Digestive juices mix with food.Digestive juices mix with food. Breaking large molecules to small Breaking large molecules to small

molecules.molecules. Begins in mouth.Begins in mouth. Ends in small intestine.Ends in small intestine. Enzymes in the digestion systemEnzymes in the digestion system Made up of digestive track Made up of digestive track

Mayreni

Fun facts Fun facts (Continued)(Continued)

Inside of hollow organs, is a special Inside of hollow organs, is a special lining called the mucosalining called the mucosa

Digestive track also contains a layer Digestive track also contains a layer of smooth muscle that helps break of smooth muscle that helps break down food, and helps it to move down food, and helps it to move down tractdown tract

Mayreni

Thanks for Thanks for listening to our listening to our presentation!presentation!Researched by: Emily, Toni, Researched by: Emily, Toni, Jordan, Jess, and MayreniJordan, Jess, and Mayreni

Edited by: Jess Sequeira Edited by: Jess Sequeira

Jess