ORGANS OF THE DIGESTIVE SYSTEM

Anna WardRidge Road MS

DO NOW!!! PAGE 31

The Digestive System is the body system which breaks down food so that cells can use it for energy. It includes:

Esophagus Stomach Small Intestine Large Intestine

THE DIGESTIVE SYSTEM

http://www.brainpop.com/health/bodysystems/digestivesystem/preview.weml

ABOUT THE DIGESTIVE SYSTEM…

DIGESTION is the process of breaking down food into usable materials The DIGESTIVE SYSTEM

transforms the energy and materials in food to forms your body can use.

Food breaks down both MECHANICALLY and CHEMICALLY

MECHANICAL VS. CHEMICAL DIGESTION… An Activity!!!

Please listen carefully and follow my directions.

Do not eat the bread!!!

MAJOR ORGANS OF THE DIGESTIVE SYSTEM

THE MOUTH Mechanical and

Chemical Digestion begin here

The lips and tongue position the food for chewing and swallowing

The teeth break apart the food

Saliva (Spit) from glands softens the food

ESOPHAGUS

After you swallow, the tongue pushes food into your throat

The tube that connects your mouth to your stomach is your

The esophagus transports food from the mouth to the stomach

Water = 2 seconds Solid food = 8 seconds

ESOPHAGUS

STOMACH

Smooth muscle in the STOMACH continue to mix and mash food

More chemicals are added to break down food INCLUDES A VERY

STRONG ACID Stomach is lined with

mucus to protect it

SPECIAL ORGANS OF THE DIGESTIVE SYSTEM

Other Organs are Important too!!!

Liver

Gallbladder

Pancreas

LIVER

The LARGEST internal organ

Stores unneeded proteins

It FILTERS blood.

Has BILE that helps break down fats

GALL BLADDER

Tiny pear-shaped sac connected to the LIVER

BILE from the liver is stored here and then secreted into the small intestine

PANCREAS

Located between the stomach and intestine

Lowers acidity in the small intestine

Important for absorbing food substances

SMALL INTESTINE

Food moves from the stomach to the small intestine

Food goes through chemical digestion in the small intestine

Villa in the small intestine absorb the nutrients The average length of an

adult is about 23 feet!!!!!

LARGE INTESTINE

Large Intestine is sometimes called the COLON

Water and some nutrients are absorbed

The remaining material is compacted and removed as waste (feces) through the rectum.