Human gastrointestinal tract
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   1. The Human gastrointestinal tract

   In the picture, we see a family eating. To make the functions, the body needs food to get strength. Through the food that we eat, the human gastrointestinal tract gains sufficient energy to move and interact.

   Through digestion, food is transformed into a milky substance that can be absorbed by the blood.

   2. Parts of the human gastrointestinal tract

   The human gastrointestinal tract is a set of organs that are involved with the digestive function. In the picture above, we can distinguish:

   - The mouth, with incisors, canines and molars. It also contains the saliva.

   - The esophagus that is a muscular tube between the mouth and stomach.

   - The stomach is a hollow of coarse walls.

   - The pancreas produces gastric acids.

   - The liver produces fluid called bile, which is stored in the gallbladder.

   - The small intestine is a long tube about 7 meters long.

   - The large intestine extends from the ileum to the anus. It is about 1 meter long and it has a blind-ended tube called appendix.

   - The rectum is the tube that connects the large intestine and the outside of the body through the anus.

   3. Indicate the right organ: mouth, esophagus , stomach, pancreas, liver, small intestine, large intestine or rectum

It produces gastric acids


It contains the saliva…


It is between the mouth and the stomach


Hollow of coarse walls


It contains teeth


It connects with the outside of the body


It is about 7 meters


It produces bile


It is about 1 meter


It has an appendix


It ends at the anus


   4. Human digestion process

   - It begins in the mouth; teeth grind the food into small bits. The salivary glands secrete saliva to wet the bits of food so they can continue the travel.

   - Through the esophagus, the bits of food arrive to the stomach.

   - They go around in circles and mix with some juices (produced by the stomach wall) that transform food into a kind of thick paste called chyme.

   - The chime and other juices that come from the liver (bile), the pancreas ( pancreatic juice ) and the walls of the intestine (intestinal juice) arrives to the small intestine. The chime turns into smaller broth particles called chyle, which is filtered through the intestinal walls and arrives to the blood.

   - In the large intestine, the water goes to the blood and the wastes are converted into a solid mass or feces.

   - The feces are expelled through the anus.

   5. Indicate the correct organ: mouth, esophagus, stomach, small intestine, large intestine or anus

Where chyme occurs


It contains the salivary glands


Before arrive to the stomach


The teeth grind food


They go around in circles


The Bile comes to the…


The water goes to the blood


The pancreatic juice comes to the…


Feces are expelled


The residues are converted into a solid mass


   6. Hygiene of human gastrointestinal tract
   Is it important a good digestion? Yes, it is. Look these instructions:
   - Brush the teeth after every meal and at least once a day. If we have caries or infections, we must go to the dentist. Go to the doctor once a year for a general medical examination or cleaning.
   - Respect the time of meals, do not eat at wrong time.
   - Chew and wet correctly the food in order to improve digestion.
   - Eat slowly.
   - Wash hands before eating.
   - Do not eat too much. It’s better stay with some appetite than eat until burst.
   - Do not take a shower during the next two or three hours after eating.
   - Avoid the excess of sweets because they cause caries.
   - Do not use teeth to break hard objects.

   7. Answer if these advices are correct or incorrect:

Brush the teeth once a week


Chew correctly the food


Eat fast


Eat a lot food


Wash hands before eating


Respect the time to eat


Take a shower after eating


Eat few sweets


Break hard objects with teeth


If there are caries, we must go to the dentist


| Educational applications | Natural sciences |
In Spanish | Interactive |

®Arturo Ramo García.-Record of intellectual property of Teruel (Spain) No 141, of 29-IX-1999
Plaza Playa de Aro, 3, 1º DO 44002-TERUEL