• 14 May 12
  

  Janice T

  Good website for the process and how it works.

  Digestive System digestion humanbody

• 17 Apr 12
  

  Xavier Harley

  The digestive system and how it works.

• 16 Apr 12
  

  Jacob Coon

  digestive

  • Organs that make up the digestive tract are the mouth, esophagus, stomach, small intestine, large intestine—also called the colon—rectum, and anus.
• 10 Apr 12
  

  Jeremy Whittenberger

  digestive system

  • The digestive system is made up of the digestive tract—a series of hollow organs joined in a long, twisting tube from the mouth to the anus—and other organs that help the body break down and absorb food
  • Two “solid” digestive organs, the liver and the pancreas, produce digestive juices that reach the intestine through small tubes called ducts. The gallbladder stores the liver's digestive juices until they are needed in the intestine. Parts of the nervous and circulatory systems also play major roles in the digestive system.
  • Digestion involves mixing food with digestive juices, moving it through the digestive tract, and breaking down large molecules of food into smaller molecules.

  • Two types of nerves help control the action of the digestive system.

      

    Extrinsic, or outside, nerves come to the digestive organs from the brain or the spinal cord. They release two chemicals, acetylcholine and adrenaline. Acetylcholine causes the muscle layer of the digestive organs to squeeze with more force and increase the “push” of food and juice through the digestive tract. It also causes the stomach and pancreas to produce more digestive juice. Adrenaline has the opposite effect. It relaxes the muscle of the stomach and intestine and decreases the flow of blood to these organs, slowing or stopping digestion.

  • The intrinsic, or inside, nerves make up a very dense network embedded in the walls of the esophagus, stomach, small intestine, and colon. The intrinsic nerves are triggered to act when the walls of the hollow organs are stretched by food. They release many different substances that speed up or delay the movement of food and the production of juices by the digestive organs.

      

    Together, nerves, hormones, the blood, and the organs of the digestive system conduct the complex tasks of digesting and absorbing nutrients from the foods and liquids you consume each day.

  3 more annotations...

• 18 Mar 12
  

  Jennifer Du Bont

  This is Good a government site.

• 06 Mar 12
  

  Griselda Sanchez

  This website will help you guide through how the digstive sytem works and help understand the componets when looking at plastinaes. This is a good resource for finishing the assignmnt that will be assigned after the field trip aswell. Use the website wisely.

  Digestion System Physiology

• 06 Feb 12
  

  Luke K
  • When you eat foods—such as bread, meat, and vegetables—they are not in a form  that the body can
  • use as nourishment. Food and drink must be changed into smaller molecules of  nutrients before they
  • can be absorbed into the blood and carried to cells throughout the body

  • The digestive glands that act first are in the mouth—the salivary glands.  Saliva produced by these glands contains an enzyme that begins to digest the  starch from food into smaller molecules. An enzyme is a substance that speeds up  chemical reactions in the body.

     

    The next set of digestive glands is in the stomach lining. They produce  stomach acid and an enzyme that digests protein. A thick mucus layer coats the  mucosa and helps keep the acidic digestive juice from dissolving the tissue of  the stomach itself. In most people, the stomach mucosa is able to resist the  juice, although food and other tissues of the body cannot.

     

    After the stomach empties the food and juice mixture into the small  intestine, the juices of two other digestive organs mix with the food. One of  these organs, the pancreas, produces a juice that contains a wide array of  enzymes to break down the carbohydrate, fat, and protein in food. Other enzymes  that are active in the process come from glands in the wall of the  intestine.

     

    The second organ, the liver, produces yet another digestive juice—bile. Bile  is stored between meals in the gallbladder. At mealtime, it is squeezed out of  the gallbladder, through the bile ducts, and into the intestine to mix with the  fat in food. The bile acids dissolve fat into the watery contents of the  intestine, much like detergents that dissolve grease from a frying pan. After  fat is dissolved, it is digested by enzymes from the pancreas and the lining of  the intestine.

  • Protein. Foods such as meat, eggs, and beans consist of  giant molecules of protein that must be digested by enzymes before they can be  used to build and repair body tissues. An enzyme in the juice of the stomach  starts the digestion of swallowed protein. Then in the small intestine, several  enzymes from the pancreatic juice and the lining of the intestine complete the  breakdown of huge protein molecules into small molecules called amino acids.  These small molecules can be absorbed through the small intestine into the blood  and then be carried to all parts of the body to build the walls and other parts  of cells.
  • Most digested molecules of food
  • —starch and sugar—are broken into simpler molecules by enzymes in the saliva,

  • Fats. Fat molecules are a rich source of energy for the  body. The first step in digestion of a fat such as butter is to dissolve it into  the watery content of the intestine. The bile acids produced by the liver  dissolve fat into tiny droplets and allow pancreatic and intestinal enzymes to  break the large fat molecules into smaller ones. Some of these small molecules  are fatty acids and cholesterol. The bile acids combine with the fatty acids and  cholesterol and help these molecules move into the cells of the mucosa. In these  cells the small molecules are formed back into large ones, most of which pass  into vessels called lymphatics near the intestine. These small vessels carry the  reformed fat to the veins of the chest, and the blood carries the fat to storage  depots in different parts of the body.

  • Vitamins. Another vital part of food that is absorbed  through the small intestine are vitamins. The two types of vitamins are  classified by the fluid in which they can be dissolved: water-soluble vitamins  (all the B vitamins and vitamin C) and fat-soluble vitamins (vitamins A, D, E,  and K). Fat-soluble vitamins are stored in the liver and fatty tissue of the  body, whereas water-soluble vitamins are not easily stored and excess amounts  are flushed out in the urine.

  7 more annotations...

• 05 Dec 11
  

  Brett T

  Digestive System

  • At the junction of the esophagus and stomach, there is a ringlike muscle, called  the lower esophageal sphincter
  • Swallowed food is pushed into the esophagus, which connects the throat above  with the stomach below
  • stomach has three mechanical tasks
  • First, it stores the swallowed food and liquid.
  • The lower part of the stomach mixes these materials by its muscle action. The  third task of the stomach is to empty its contents slowly into the small  intestine.
  • Finally, the digested nutrients are absorbed through the intestinal walls and  transported throughout the body
  • The waste products of this process include undigested parts of the food, known  as fiber, and older cells that have been shed from the mucosa
  • pushed into the colon, where they remain until the feces are expelled by a bowel  movement.

  6 more annotations...

• 28 Nov 11
  

  Madison W
  • The digestive system is made up of the digestive tract—a series of hollow organs  joined in a long, twisting tube from the mouth to the anus—and other organs that  help the body break down and absorb food
  • mouth, esophagus,   

    1

    stomach , small  intestine, large intestine—also called the colon—rectum, and anus.
  • Inside these hollow organs is a lining called the mucosa. In the mouth, stomach,  and small intestine, the mucosa contains tiny glands that produce juices to help  digest food
  • the liver and the pancreas, produce digestive juices that reach the intestine  through small tubes called ducts.
  • The gallbladder stores the liver's digestive juices until they are needed in the  intestine. Parts of the nervous and circulatory systems also play major roles in  the digestive system.

  3 more annotations...

• 

  Christina K

  digestive system
  question #3

  • Swallowed food is pushed into the esophagus, which connects the throat above  with the stomach below. At the junction of the esophagus and stomach, there is a  ringlike muscle, called the lower esophageal sphincter, closing the passage  between the two organs. As food approaches the closed sphincter, the sphincter  relaxes and allows the food to pass through to the stomach.

  • The stomach has three mechanical tasks. First, it stores the swallowed food  and liquid. To do this, the muscle of the upper part of the stomach relaxes to  accept large volumes of swallowed material. The second job is to mix up the  food, liquid, and digestive juice produced by the stomach. The lower part of the  stomach mixes these materials by its muscle action. The third task of the  stomach is to empty its contents slowly into the small intestine.

  • Several factors affect emptying of the stomach, including the kind of food  and the degree of muscle action of the emptying stomach and the small intestine.  Carbohydrates, for example, spend the least amount of time in the stomach, while  protein stays in the stomach longer, and fats the longest. As the food dissolves  into the juices from the pancreas, liver, and intestine, the contents of the  intestine are mixed and pushed forward to allow further digestion.
  • bowel movement
  • Finally, the digested nutrients are absorbed through the intestinal walls and  transported throughout the body. The waste products of this process include  undigested parts of the food, known as fiber, and older cells that have been  shed from the mucosa. These materials are pushed into the colon, where they  remain until the feces are expelled by a bowel movement

  3 more annotations...

• 18 Nov 11
  

  hannah williams

  anatomy digestion Unit 10: Supply Systems

• 24 Oct 11
  

  mackenzee neiswender
  • The digestive system is made up of the digestive tract
  • series of hollow organs joined in a long, twisting tube from the mouth to the anus
  • digestive tract
  • mouth, esophagus, stomach, small intestine, large intestine—also called the colon—rectum, and anus.
  • mouth
  • digestive tract

  4 more annotations...

• 

  Mackenzie Airey
• 

  cameron webb
  • The digestive system is made up of the digestive tract
• 22 Sep 11
  

  sandra Zavala

  This website describes the Digestive System and how it works. It talks about why it is important, how food is digested, how the digestive process is controlled, and other important information. This is also a kind of good site because it shows the importance of the digestive system and how food is digested. It needs to talk about the parts and how they all work too.

• 

  Natalie Gutierrez

  It works good and has good info.

• 

  Mirasol Rangel

  a.) What is in it is how it works and the process it goes through. Why digestion is important. How it digests.
  b.) I think it's useful because it gives lots of information.
  c.) i think its useful because it covers everything we need to know.

• 13 Jul 11
  

  Jeremy Rellinger

  digestion

• 11 Jun 11
  

  ftarshouby
  • The large, hollow organs of the digestive tract contain a layer of muscle that enables their walls to move. The movement of organ walls can propel food and liquid through the system and also can mix the contents within each organ. Food moves from one organ to the next through muscle action called peristalsis. Peristalsis looks like an ocean wave traveling through the muscle. The muscle of the organ contracts to create a narrowing and then propels the narrowed portion slowly down the length of the organ. These waves of narrowing push the food and fluid in front of them through each hollow organ.
  • The first major muscle movement occurs when food or liquid is swallowed. Although you are able to start swallowing by choice, once the swallow begins, it becomes involuntary and proceeds under the control of the nerves.
  • Swallowed food is pushed into the esophagus, which connects the throat above with the stomach below. At the junction of the esophagus and stomach, there is a ringlike muscle, called the lower esophageal sphincter, closing the passage between the two organs. As food approaches the closed sphincter, the sphincter relaxes and allows the food to pass through to the stomach.
  • The stomach has three mechanical tasks. First, it stores the swallowed food and liquid. To do this, the muscle of the upper part of the stomach relaxes to accept large volumes of swallowed material. The second job is to mix up the food, liquid, and digestive juice produced by the stomach. The lower part of the stomach mixes these materials by its muscle action. The third task of the stomach is to empty its contents slowly into the small intestine.

  • Several factors affect emptying of the stomach, including the kind of food and the degree of muscle action of the emptying stomach and the small intestine. Carbohydrates, for example, spend the least amount of time in the stomach, while protein stays in the stomach longer, and fats the longest. As the food dissolves into the juices from the pancreas, liver, and intestine, the contents of the intestine are mixed and pushed forward to allow further digestion.

      
  • Finally, the digested nutrients are absorbed through the intestinal walls and transported throughout the body. The waste products of this process include undigested parts of the food, known as fiber, and older cells that have been shed from the mucosa. These materials are pushed into the colon, where they remain until the feces are expelled by a bowel movement.
  • The digestive glands that act first are in the mouth—the salivary glands. Saliva produced by these glands contains an enzyme that begins to digest the starch from food into smaller molecules. An enzyme is a substance that speeds up chemical reactions in the body.
  • The next set of digestive glands is in the stomach lining. They produce stomach acid and an enzyme that digests protein. A thick mucus layer coats the mucosa and helps keep the acidic digestive juice from dissolving the tissue of the stomach itself. In most people, the stomach mucosa is able to resist the juice, although food and other tissues of the body cannot.
  • After the stomach empties the food and juice mixture into the small intestine, the juices of two other digestive organs mix with the food. One of these organs, the pancreas, produces a juice that contains a wide array of enzymes to break down the carbohydrate, fat, and protein in food. Other enzymes that are active in the process come from glands in the wall of the intestine.
  • The second organ, the liver, produces yet another digestive juice—bile. Bile is stored between meals in the gallbladder. At mealtime, it is squeezed out of the gallbladder, through the bile ducts, and into the intestine to mix with the fat in food. The bile acids dissolve fat into the watery contents of the intestine, much like detergents that dissolve grease from a frying pan. After fat is dissolved, it is digested by enzymes from the pancreas and the lining of the intestine.
  • Starch is digested in two steps. First, an enzyme in the saliva and pancreatic juice breaks the starch into molecules called maltose. Then an enzyme in the lining of the small intestine splits the maltose into glucose molecules that can be absorbed into the blood. Glucose is carried through the bloodstream to the liver, where it is stored or used to provide energy for the work of the body.
  • Sugars are digested in one step. An enzyme in the lining of the small intestine digests sucrose, also known as table sugar, into glucose and fructose, which are absorbed through the intestine into the blood. Milk contains another type of sugar, lactose, which is changed into absorbable molecules by another enzyme in the intestinal lining.

  10 more annotations...

• 17 May 11
  

  Gabriela Guizzo Dri
  • esophagus
  • esophagus
  • esophagus
  • side these hollow organs is a lining called the mucosa

  2 more annotations...

• 14 May 11
  

  tayler ihle

  digestive nutrients cheeck it out :0

  digestion digestive anatomy biology nutrition science Health

• 01 May 11
  

  Gabe H

  • The digestive system is made up of the digestive tract—a series of hollow organs joined in a long, twisting tube from the mouth to the anus—and other organs that help the body break down and absorb food (see figure).

      

    Organs that make up the digestive tract are the mouth, esophagus, stomach, small intestine, large intestine—also called the colon—rectum, and anus. Inside these hollow organs is a lining called the mucosa. In the mouth, stomach, and small intestine, the mucosa contains tiny glands that produce juices to help digest food. The digestive tract also contains a layer of smooth muscle that helps break down food and move it along the tract.

      

    Two “solid” digestive organs, the liver and the pancreas, produce digestive juices that reach the intestine through small tubes called ducts. The gallbladder stores the liver’s digestive juices until they are needed in the intestine. Parts of the nervous and circulatory systems also play major roles in the digestive system.
  • Digestion involves mixing food with digestive juices, moving it through the digestive tract, and breaking down large molecules of food into smaller molecules. Digestion begins in the mouth, when you chew and swallow, and is completed in the small intestine.

  • The digestive glands that act first are in the mouth—the salivary glands. Saliva produced by these glands contains an enzyme that begins to digest the starch from food into smaller molecules. An enzyme is a substance that speeds up chemical reactions in the body.

      

    The next set of digestive glands is in the stomach lining. They produce stomach acid and an enzyme that digests protein. A thick mucus layer coats the mucosa and helps keep the acidic digestive juice from dissolving the tissue of the stomach itself. In most people, the stomach mucosa is able to resist the juice, although food and other tissues of the body cannot.

      

    After the stomach empties the food and juice mixture into the small intestine, the juices of two other digestive organs mix with the food. One of these organs, the pancreas, produces a juice that contains a wide array of enzymes to break down the carbohydrate, fat, and protein in food. Other enzymes that are active in the process come from glands in the wall of the intestine.

      

    The second organ, the liver, produces yet another digestive juice—bile. Bile is stored between meals in the gallbladder. At mealtime, it is squeezed out of the gallbladder, through the bile ducts, and into the intestine to mix with the fat in food. The bile acids dissolve fat into the watery contents of the intestine, much like detergents that dissolve grease from a frying pan. After fat is dissolved, it is digested by enzymes from the pancreas and the lining of the intestine.

  1 more annotation...

• 29 Apr 11
  

  Alex Ostrowski

  anatomy paper

  • Carbohydrates. The Dietary Guidelines for Americans 2005 recommend that 45 to 65 percent of total daily calories be from carbohydrates. Foods rich in carbohydrates include bread, potatoes, dried peas and beans, rice, pasta, fruits, and vegetables. Many of these foods contain both starch and fiber.
  • Protein.
  • Fats.
  • Vitamins.
  • • Gastrin causes the stomach to produce an acid for dissolving and digesting some foods. Gastrin is also necessary for normal cell growth in the lining of the stomach, small intestine, and colon.
       
    • Secretin causes the pancreas to send out a digestive juice that is rich in bicarbonate. The bicarbonate helps neutralize the acidic stomach contents as they enter the small intestine. Secretin also stimulates the stomach to produce pepsin, an enzyme that digests protein, and stimulates the liver to produce bile.
       
    • CCK causes the pancreas to produce the enzymes of pancreatic juice, and causes the gallbladder to empty. It also promotes normal cell growth of the pancreas.

  3 more annotations...

• 26 Apr 11
  

  ZIAD ABDULHUSSEEN

  how does Digestive System works

  Digestive System

• 14 Apr 11
  

  Simon M
  • 
• 04 Mar 11
  

  Charliefcds f

  Digestive System

  anatomy digestion Unit 10: Supply Systems

• 01 Mar 11
  

  Cheska Lorena

  digestion nutrition

• 24 Feb 11
  

  Claudia Wall

  digestive anatomy

• 16 Feb 11
  

  Jonathan Pratt

  biology digestion

• 28 Jan 11
  

  Madeline Moureau

  tells about how the digestive system works

• 26 Jan 11
  

  Rohan k

  This is a website that helps you learn about the digestive system.

  4KrM G4_body digestion

• 04 Jan 11
  

  Linnea Mathews

  Sugarloaf

• 31 Oct 10
  

  Al Samsa

  sc digestive_system science biology

• 04 Oct 10
  

  Molly Clark

  Digestive System 1.H.5.a

• 07 Sep 10
  

  Natalie Weltner

  uni digestive system

• 22 Aug 10
  

  J Gonzalez

  Thorough overview of the system and how different materials are digested

  Digestive

• 26 Jul 10
  

  Gary Molloy

  anatomy biology digestive system Human science

• 17 May 10
  

  Patrick Sullivan
  • glucagon-like peptide-1 (GPL-1)
  • oxyntomodulin (+ )
  • pancreatic polypeptide

  1 more annotation...

• 07 May 10
  

  Mo O
• 28 Mar 10
  

  chen_ruilian
  • System
  • Through
  • Movement
  • stomach
  • stomach

    • What are the main functions of the stomach?
    Add Sticky Note
  • Absorption and Transport of Nutrients

    • How are the digested food and nutrients absored by the body?
    Add Sticky Note
  • Carbohydrates
  • Sugars
  • Fiber
  • Protein
  • Vitamins
  • Water

  10 more annotations...

• 08 Mar 10
  

  Olivia Kilmartin

  health social_care science biology nutrition body food digestion

• 25 Feb 10
  

  imelda bettinger

  health science body nutrition food education resource digestive digestion biology anatomy

• 13 Nov 09
  

  meldar
  • Organs that make up the digestive tract are the mouth, esophagus, stomach, small intestine, large intestine—also called the colon—rectum, and anus.
  • Two “solid” digestive organs, the liver and the pancreas, produce digestive juices that reach the intestine through small tubes called ducts
  • • Notes can be left along side the text to focus readers in on the text as a whole.
    Add Sticky Note
  • Digestion is the process by which food and drink are broken down into their smallest parts so the body can use them to build and nourish cells and to provide energy.

    • Students can see where important information is placed inside of the text.

    • What is digestion?
    Add Sticky Note
  • Digestion involves mixing food with digestive juices, moving it through the digestive tract, and breaking down large molecules of food into smaller molecules. Digestion begins in the mouth, when you chew and swallow, and is completed in the small intestine.

    • Notes can be left in the text to focus students on something specific.
    Add Sticky Note
  • The first major muscle movement occurs when food or liquid is swallowed.
  • The stomach has three mechanical tasks. First,
  • The second job
  • The third task
  • Production of Digestive Juices

    • Sub-headings can be highlighted and questions left there to help with more focused reading.
    Add Sticky Note
  • How is the digestive process controlled?

    • If the text gets difficult, students can reply back, asking questions about vocabulary or word meaning.
    Add Sticky Note

  9 more annotations...

• 17 Aug 09
  

  Maddie Thomas
• 

  Raquel O'Neill

  Information About Digestive System

• 01 Aug 09
  

  Shelly Buckman

  Provides general information about the organs of the digestive system, the digestive process, and the absorption of nutrients. Includes a list of additional readings. Also available in Spanish (DD-201).

  Bookmarks_Menu Health Digestion

• 23 Jun 09
  

  Katherine Dailey
  •    

    <!--end include--><!--body text goes here-->  Your Digestive System and How It Works   On this page:     Why is digestion important?   How is food digested?   How is the digestive process controlled?   For More Information   The digestive  system.   The digestive system is made up of the digestive tract—a series of hollow  organs joined in a long, twisting tube from the mouth to the anus—and other  organs
  • Organs that make up the digestive tract are the mouth, esophagus, stomach, small  intestine
• 22 May 09
  

  ployun Boonyarattaglin

  digestive

• 15 Apr 09
  

  prap2577

  Other

• 22 Mar 09
  

  Melissa Jackson
• 01 Feb 09
  

  TStorms43 Storms

  Digestion Resources

  Digestion

• 11 Nov 08
  

  Andrea Stewart

  anatomy digestion

• 09 May 08
  

  Chris Heumann

  Unit 10: Supply Systems

• 13 Jul 07
  

  levent

Public Stiky Notes

• 
  meldar on 2009-11-16
  Notes can be left along side the text to focus readers in on the text as a whole.
• 
  chen_ruilian on 2010-03-28
  What is digestion?
• 
  meldar on 2009-11-16
  Students can see where important information is placed inside of the text.
• 
  meldar on 2009-11-16
  Notes can be left in the text to focus students on something specific.
• 
  meldar on 2009-11-16
  Sub-headings can be highlighted and questions left there to help with more focused reading.
• 
  chen_ruilian on 2010-03-28
  What are the main functions of the stomach?
• 
  chen_ruilian on 2010-03-28
  How are the digested food and nutrients absored by the body?
• 
  meldar on 2009-11-16
  If the text gets difficult, students can reply back, asking questions about vocabulary or word meaning.

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