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Module 1: Módulo 3: Introdução ao sistema digestivo humano

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Introdução ao sistema digestivo humano

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The overall function of the human digestive system is to provide materials to be used by the individual cells of the body.

• These materials are used by the cells:

• as energy for life processes.

• for growth and repair of body tissues.

• Click on the labels in the graphic to learn about the components of the human digestive system.



The functions of the mouth, pharynx and salivary glands include:

• ingestion and chewing of food

• initiation of swallowing reflex

• moistening of food

• partial digestion of food using the amylase enzyme

The esophagus provides the pathway for food to reach the stomach.

• It functions include:

• movement of food to the stomach by peristaltic waves

• lubrication

The liver is a large organ located in the upper right part of the abdomen.

• Its functions include:

• the secretion of bile used by the small intestine in the digestive process; this includes bile salts needed to increase the solubility of fats

• many other non-digestive functions

Between meals the gall bladder stores bile which has been secreted by the liver.
The pancreas is an elongated gland located behind the stomach.

It secretes digestive enzymes into the small intestine.
The stomach is a sac-like organ located between the esophagus and the small intestine.

• Its functions include:

• storing, dissolving and mixing food

• partial digestion of food

• regulation of emptying of dissolved food into the small intestine
The functions of the large intestine include:

• temporary storage of undigested material

• absorption of some salt and water

• mixing and propulsion of contents

• defecation
The small intestine is a long tube that leads from the stomach to the large intestine.

• Its functions include:

• the final stage of digestion

• absorption of most substances

• The following processes are involved in the human digestive system:

• Ingestion (taking in) of foods

• Initial processing

• Storage

• Digestion

• Absorption

• Elimination of unused materials