The digestive system

The organs in the digestive tract

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The organs in the digestive tract
The role of the digestive system The role of the digestive system The role of the digestive system The role of the digestive system The role of the digestive system The role of the digestive system The role of the digestive system Anatomy of the digestive tract Anatomy of the digestive tract The anatomy of the digestive tract The anatomy of the digestive tract The anatomy of the digestive tract The anatomy of the digestive tract The anatomy of the digestive tract The digestive glands The digestive glands The digestive glands The digestive glands The digestive glands The digestive glands The digestive glands The abdominal brain The abdominal brain The abdominal brain The abdominal brain The abdominal brain The abdominal brain The abdominal brain
The stages of digestion
Transforming food Transforming food Transforming food Transforming food Transforming food Transforming food Transforming food Mechanical and chemical transformation Mechanical and chemical transformation Mechanical and chemical transformation Mechanical and chemical transformation Mechanical and chemical transformation Mechanical and chemical transformation Mechanical and chemical transformation Digestion: from mouth to anus From the mouth to the anus From the mouth to the anus From the mouth to the anus The mouth The mouth The mouth The mouth The mouth The mouth The mouth The oesophagus The oesophagus The oesophagus The oesophagus The oesophagus The oesophagus The oesophagus The stomach The stomach The stomach The stomach The stomach The stomach The stomach The small intestine The small intestine The small intestine The small intestine The small intestine The small intestine The small intestine The large intestine The large intestine The large intestine The large intestine The large intestine Domestiquer et transformer la nature pour produire The large intestine The large intestine Intestinal flora Intestinal flora Intestinal flora Intestinal flora Intestinal flora Intestinal flora Intestinal flora
Historical representations of digestion
In the 2nd century In the 2nd century In the 2nd century In the 2nd century In the 2nd century In the 2nd century In the 2nd century In the 17th century In the 17th century In the 17th century In the 17th century In the 17th century In the 17th century In the 17th century From the 18th to the 20th century From the 18th to the 20th century From the 18th to the 20th century From the 18th to the 20th century From the 18th to the 20th century From the 18th to the 20th centuries From the 18th to the 20th century Today Today Today Today Today Today Today
Digestive phenomena
What is a digestive event? What is a digestive event? What is a digestive event? What is a digestive event? What is a digestive event? What is a digestive event? What is a digestive event? Food going down the wrong way Food going down the wrong way Food going down the wrong way Food going down the wrong way Food going down the wrong way Food going down the wrong way Food going down the wrong way Eructation Eructation Eructation Eructation Eructation Eructation Eructation Hiccups Hiccups Hiccups Hiccups Hiccups Hiccups Hiccups Stomach ache Stomach ache Stomach ache Stomach ache Stomach ache Stomach ache Stomach ache Vomiting Vomiting Vomiting Vomiting Vomiting Vomiting Vomiting Borborygmus Borborygmus Borborygmus Borborygmus Borborygmus Borborygmus Borborygmus Intestinal wind Intestinal wind Intestinal wind Intestinal wind Intestinal wind Intestinal wind Intestinal wind Diarrhoea Diarrhoea Diarrhoea Diarrhoea Diarrhoea Diarrhoea Diarrhoea Constipation Constipation Constipation Constipation Constipation Constipation Constipation

The digestive glands are structures which secrete chemical substances.
For example: the salivary glands secrete saliva.

Some digestive glands are within the walls of the digestive tract.
For example: the gastric glands are part of the stomach wall.

Other digestive glands are adjacent to the digestive tract and linked by ducts.
For example: salivary glands are linked to the mouth. 
 

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The digestive glands

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APPENDED DIGESTIVE GLANDS

Digestive glands produce the chemical substances found in the various organs of the digestive tract. The term chemical substance may seem vague, but there is one we all know well – saliva. Saliva is secreted by digestive glands called salivary glands. The mouth is not the only organ in the digestive tract to have glands. Although some organs, such as the oesophagus and large intestine, do not have any glands at all.

Salivary glands are appended to the digestive tract by ducts.

The pancreas, liver and gall bladder are examples of other ‘appended’ glands.

If we zoom in a bit, we can see that these glands are also appended to the digestive tract via ducts.

INTEGRATED DIGESTIVE GLANDS

There are other digestive glands that are not depicted because they are directly integrated into the wall of the digestive tract. These do not have ducts. Gastric glands, for example, are integrated into the stomach wall.

Likewise, intestinal glands are integrated into the wall of the small intestine.

GLANDS IN DIGESTIX

DIGESTIX has several kinds of game pieces, including digestive glands. The game differentiates between appended glands and integrated glands by asking you to place the pieces either at a distant slot connected by a duct or directly on the wall.

We could go into much more detail. For example, a dentist will have extensive knowledge of the anatomy of the mouth and its salivary glands, along with the classification and composition of teeth. There are three salivary glands called the parotid gland, the sublingual gland and the submaxillary gland.

The ducts also have specific names. The pancreatic duct is called the Wirsung duct, after the German anatomist who discovered it. The duct that leaves the liver is the hepatic duct.

The body’s anatomy is quite complex. Although the human body is well organised, researchers continue to study it because we do not yet know all its secrets!

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