The digestive system

The stages of digestion

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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

In the mouth, food is cut and broken up by the teeth. This is a mechanical transformation known as mastication.

Saliva, secreted by the salivary glands, moistens food so it can become a soft paste called the alimentary bolus. This mechanical transformation is called insalivation.

Saliva contains an enzyme, called  salivary amylase, which gets chemical digestion started. Amylase starts to transform starch.

The tongue is a very powerful muscle. It pushes the alimentary bolus to the back of the mouth for it to be swallowed.
 

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The mouth

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TEETH

Digestion starts in the mouth where teeth break up food into small pieces. The incisors cut, the canines tear and the molars crush food. This mechanical transformation is called mastication.

SALIVA

The salivary glands are also found in the mouth. They secrete saliva.

Saliva moistens food, making it easier to break up. This process is called insalivation. Once transformed, the food is referred to as a bolus of food. Saliva contains enzymes that start the chemical digestion process. Salivary amylase, for example, breaks down certain complex carbohydrates, such as starch and glycogen.

THE TONGUE

Taste buds help us determine how food tastes. Taste buds are the small bumps on the tongue.

Since taste buds are only sensitive to substances that have been dissolved, saliva plays an important role in the perception of taste. Food must be soaked with saliva for us to sense what it tastes like. The tongue is a very powerful muscle that propels the bolus of food towards the back of the mouth so it can be swallowed.

THE MOUTH IN DIGESTIX

In DIGESTIX, the teeth and salivary glands are game pieces associated with the mouth. For digestion to be effective, these pieces must be placed at the upstream of the digestive tract. This allows the teeth to break food down into several fragments, and saliva to start the chemical digestion process.
When playing DIGESTIX, one of the first things you need to realise is that the game pieces only transform certain targets. Quite intuitively, the teeth transform food into fragments.
What about the salivary glands? They can also transform food into fragments, but they are not as efficient as the teeth in doing so.
However, they are also capable of transforming food fragments into nutrients. You perhaps remember that salivary amylase breaks down certain complex carbohydrates. So to sum up, salivary glands have three targets – food, fragments, and carbohydrates.

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