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The Digestive System
By John McCormack
Did someone say Quiz?
What is
important?
What are the
processes and
functions of the
organs?
Who knows what
else may be at
the end?
The Beginning of
Digestion
• Mouth- Before you begin eating,
saliva starts to form in your
mouth
• Saliva starts to break down the
food while you eat to make it
easier to swallow.
The Highway to the
Stomach
• Esophagus- After swallowing,
food travels through the
esophagus.
• Muscles in the esophagus move
the food down and into the
stomach.
• This process usually takes 2-3
seconds.
Stomach
• After food leaves the esophagus
it end up in the stomach. The
stomach has 3 important jobs.
• to store the food you've eaten
• to break down the food into a
liquidy mixture
• to slowly empty that liquidy
mixture into the small intestine
Liver
• The liver
performs many
tasks, including
storing energy
and helping the
body get rid of
toxins (poisons).
Gall Bladder
• Stores Bile
• It releases bile into the
duodendum to help digest the
fats you eat.
Pancreas
• The pancreas
makes hormones
(insulin) to
regulate the
blood sugar
levels.
• It also makes
enzymes to
break down food
in the intestines.
Small Intestine
• It is called small because of the
width.
• It is actually a much longer tube
than the large intestine.
Large Intestine
• The large intestine consists of
three parts.
• Cecum
• Colon
• rectum
Colon
• The last place waste is stored
until it leaves the body.
Summary
Fun Facts
• Digestion actually starts before
you put food in your mouth.
• How does a nice slice of pizza
sound to you.
• Is Saliva forming in your mouth
for a nice piece of candy?
Comprehension
Questions
1) What is the first step of
Digestion.
2) What is the role of the liver?
3) Name two things the stomach
does?
4) Name the three parts of the
large intestine and one
function of one of those parts?
Works Cited
 http://kidshealth.org/kid/body/di
gest_noSW.html
 www.georgetown.edu/.../
images/pancreas.jpg