Download Learn the Parts of the Human Digestive System

Digestive System
Exploring Health Sciences
8th Grade
Mrs. Sergent, RN, CNOR, RNFA
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About the Presentation
Mouth & Teeth
Esophagus
Stomach
Small Intestines
Liver & Pancreas
Large Intestines
Colon
Rectum & Anus
Review of Digestive System Videos
Authors slide
Resources
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Click to hear
what digestion
sounds like in
your mouth!
The mouth is where digestion first begins. Food starts in your
mouth and you begin digestion by chewing with your teeth. Food
mixes with your salvia to make a soft ball of food. Next the ball
of food moves into the esophagus.
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Food moves through
your esophagus which
is a tube that is about
25 cm long. It takes 4
to 10 seconds for
your food to move
through the
esophagus. Your
smooth muscles then
move the food down
toward the stomach.
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The stomach is a
muscular bag that
can grow and shrink.
Chemicals are mixed
in with the food in
your stomach in
order to break it
down. Food digests in
your stomach for 2
to 4 hours until it
becomes a liquid
called “chyme”
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Your small intestines is 4
to 7 meters in length.
Most digestion takes
place in the small
intestines. Different
chemicals are released
into the small intestines
to break down fats,
carbohydrates, and
proteins. The absorption
of nutrients into your
body also takes place in
the small intestines.
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The liver gives off a greenish fluid called bile which breaks up
the fat in the food you eat. Fats are broken down in the small
intestines. Your pancreas gives off chemicals that make a
digestive solution which helps break down food in the small
intestines. It also gives off insulin which lets sugar go into your
blood stream
Pancreas
Liver
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Your large intestine’s
main job is to absorb
water from the mass
of food that has not
been digested. This
keeps water inside your
body so that you do not
dehydrate.
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Your colon is part of your large intestines. The colon forms
waste material that is going to be sent out of your body.
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The rectum and anus are part of your large intestines. They
release your waste material from the body.
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* School House Rock Time
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References
Ortleb, Edward, and Dinah Zike.
Human Body Systems. New York:
McGraw Hill Companies Inc.,
2008.
School House Rock. (2012, May 12).
Digestion-Body Machine [Video file].
Retrieved from
https://www.youtube.com/watch?v=jh
2-g3ftCaE
West, J. (2013). Grand Valley State
University [PowerPoint slides].
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