Digestive System The digestive system is made up of the

alimentary canal and the other abdominal organs that play a part in digestion, such as the liver and pancreas.

The digestive tract is the long tube of organs — including the esophagus, the stomach, and small and large intestines —that runs from the mouth to the anus.

An adult's digestive tract is about 30 feet long.

The function is to breakdown and absorb nutrients that are necessary for growth and maintenance.

Digestive System

The digestive system breaks down food two ways:

mechanical digestion- the chewing (in the mouth) and churning (in the stomach) that can be used by the body.

chemical digestion- with the help of enzymes, into substances that cells can absorb and use. This occurs in the mouth, stomach and smallintestines.

What is the role of the digestive system in the human body ?

The Digestive System

Purpose: it breaks down food into molecules the body can

use, the molecules are absorbed into the blood and carried

throughout the body, and wastes are eliminated from the body.

Major Organs and their Functions:

Mouth – to chew and grind up food

-- saliva also begins the chemical breakdown

What is the role of the digestive system in the human body ?

The Digestive System

Purpose: it breaks down food into molecules the body can

use, the molecules are absorbed into the blood and carried

throughout the body, and wastes are eliminated from the body.

Major Organs and their Functions:

Esophagus – pipe connecting mouth to stomach

What is the role of the digestive system in the human body ?

The Digestive System

Purpose: it breaks down food into molecules the body can

use, the molecules are absorbed into the blood and carried

throughout the body, and wastes are eliminated from the body.

Major Organs and their Functions:

Stomach – secretes an extraordinarily strong acid (pH = 2)

that leads to breakdown of food and churns the food

-- once the food is broken down in the stomach and

mixed with digestive juices, it is called chyme

What is the role of the digestive system in the human body ?

Pancreas – produces the hormone insulin that regulates

blood sugar levels

-- also help neutralize stomach acid

Liver – produces bile, which breaks down fats in foods

Gallbladder – pouch-like organ that stores bile for future use

What is the role of the digestive system in the human body ?

Small Intestine – after digestion is complete, the chyme

enters the small intestine where it is absorbed into the

bloodstream

-- the chyme is propelled along by folded surfaces

called villi, on the intestine

What is the role of the digestive system in the human body ?

Large Intestine – removes water from the chyme and gets the

waste ready for excretion

The Digestive System

Purpose: it breaks down food into molecules the body can

use, the molecules are absorbed into the blood and carried

throughout the body, and wastes are eliminated from the body.

Major Organs and their Functions:

Mouth – to chew and grind up food

-- saliva also begins the chemical breakdown

Esophagus – pipe connecting mouth to stomach

Stomach – secretes an extraordinarily strong acid (pH = 2)

that leads to breakdown of food

-- once the food is broken down in the stomach and

mixed with digestive juices, it is called chyme

Pancreas – produces the hormone insulin that regulates

blood sugar levels

-- also help neutralize stomach acid

Liver – produces bile, which breaks down fats in foods

Gallbladder – pouch-like organ that stores bile for future use

Small Intestine – after digestion is complete, the chyme

enters the small intestine where it is absorbed into the

bloodstream

-- the chyme is propelled along by folded surfaces

called villi, on the intestine

Large Intestine – removes water from the chyme and gets the

waste ready for excretion