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Lesson Plan
WHAT IS THE DIGESTIVE
SYSTEM?
The digestive system is a series of connected
organs from mouth to anus whose purpose is to
break down, digest and excrete wastes from the
food we eat.

THE ORGANS OF THE DIGESTIVE
SYSTEM
Your Mouth
 Esophagus
 Stomach
 Small Intestine
 Large Intestine
 Rectum/Colon

Other Organs:
-Pancreas
-Liver
-Gallbladder
YOUR MOUTH
Your mouth is the first place your food will go to
start the digestive process. In your mouth the
food is grinded with your teeth along with the
help of saliva. Your saliva and teeth together
break your food down into tiny pieces.
THE ESOPHAGUS
The Esophagus is the second organ of your
digestive track. Your esophagus is like a long
pipe. It connects your mouth to your stomach and
moves food down by the use of muscles in the
walls of the esophagus.
THE STOMACH
Your stomach is connected to your esophagus. The
stomach is shaped like the letter “J” and is a
small sack-like figure. Your stomach stores the
food you have eaten, breaks down the food into a
liquid mixture, and slowly empties that mixture
into the small intestine.
THE SMALL INTESTINE
The small intestine is a tube that is about 1.5 to 2
inches around and is beneath your stomach.
Inside the small intestine food is broken down
even more so your body can absorb vitamins and
minerals.
THE LARGE INTESTINE
The large intestine is about 3 to 4 inches around. It
is almost the last stop of the digestive track and
would be about 5 feet long if it were to be
removed from the human body.
RECTUM/COLON
The rectum and colon work together as the last
stop of the digestive track. The rectum serves as
a warehouse for the waste material after leaving
the colon. The rectum is about 8 inches long.
OTHER ORGANS
Pancreas- Contains digestive enzymes that help further
break down carbohydrates, fat, and protein
Liver- Production of biochemical's needed for digestion.
Gallbladder- Production of bile. It is not needed for
digestion.
liver
gallbladder
pancreas
YOUR SALIVA AIDS IN DIGESTION IN WHAT
ORGAN OF THE SYSTEM?
Large Intestine
Small Intestine
Mouth
Esophagus
TRY AGAIN!!!!!
To Question: 1. 2. 3. 4. 5.
THAT IS CORRECT!
To Question: 1. 2. 3. 4. 5.
NAME ONE OF THE PURPOSES OF THE
DIGESTIVE SYSTEM
-Digest and excrete wastes from the food we eat
- To get food into your body
- To hold protein
- To aid in homeostasis
WHAT IS THE NAME OF THE ORGAN THAT
IS SHAPED LIKE A “J”?
- Esophagus
- Stomach
- Large Intestine
- Rectum
WHAT ORGAN WOULD BE ABOUT 5 FEET
LONG IF REMOVED FROM THE BODY?
- Small Intestine
- Esophagus
- Large Intestine
- Rectum
YOUR ESOPHAGUS USES THE HELP OF WHAT, TO
MOVE FOOD DOWN THE LONG TUBE?
- Saliva
- Protein
-Muscles
- Teeth