Transcript www.sciencea2z.com

Everyone Poops!
The Digestive System
By Stephanie Siltanen
http://punditdad.files.wordpress.com/2009/01/poop.jpg
Where does the digestive
system begin?
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It starts in your
mouth as you smell
your favorite food
and your mouth
begins producing
saliva.
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g
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b/4/4d/Cheeseburger.jpg/800px-Cheeseburger.jpg
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What does it do?
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Your body gets
nutrients from the
food that you eat.
The digestive
system helps your
body absorb these
nutrients.
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The Parts
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The digestive
system starts in your
mouth and ends...
you know where.
Each part has a
crucial part in
helping your body
absorb nutrients and
get rid of waste.
In the mouth
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Saliva (spit) helps
break down food to
create a small
mushy wad of food,
that is easier to
swallow.
The tongue pushes
the mushy food
down the throat &
into the esophagus.
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Esophagus
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Moves food from
your throat to your
stomach.
The muscles in your
throat move in a
wavy movement to
slowly move the
food through the
esophagus.
2-3 second process
http://www.mrslarsonsclass.com/digestivesystempictures/esophagus2.jpg.jpg
Also in the throat
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The esophagus has a
flap called the epiglottis
that closes your airways
when you swallow to
make sure that food does
not go into your
windpipe.
If you drink something
fast and someone says “it
went down the wrong
pipe” they are referring
that the liquid went down
your windpipe on
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accident.
Next stop, the stomach
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Jobs of the stomach:
Store food
Break down food
into a liquid mixture
with stomach acid
Slowly move the
liquid into the small
intestine.
Still in the stomach
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The stomach acts
like a blender, using
the strong stomach
muscles and gastric
juices to create a
liquid mixture to
send to the small
intestine. These
juices also kill
bacteria!
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The (not so) small intestine
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The average adult small
intestine is 22 ft long (4
of me)!
Breaks down food even
more so that the body
can absorb the nutrients
from your food. (Such as
the calcium from the
cheese on your pizza)
Food can spend up to 4
hours in the intestine
juice bath.
Small intestine helpers
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The liver, gallbladder,
and pancreas send juices
to the small intestine to
help the body absorb the
nutrients.
Pancreas juices help
digest fat and protein
Liver juices (bile) helps
the blood stream absorb
fat
Gallbladder stores the
bile until the body needs
it.
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The liver
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http://topnews.in/healthcare/sites/default/files/Liver-Damage.jpg
Your liver filters out
waste from nutrients.
Distributes nutrients
to the rest of the
body or stores some
vitamins.
Where do the left overs go?
The large intestine
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Thicker than the
small intestine.
5 ft long.
The waste left over
after the body has
absorbed the
nutrients begins its
final journey exiting
the body.
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Parts of the large intestine
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The appendix is a part of
the large intestine that
doesn't do anything but
cause problems.
Passes through the colon,
the last chance for the body
to absorb water and
minerals into the blood. As
the last of the water is
absorbed, the waste turns
into a solid called POOP!
(or bowel or stool).
Move it along
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The large intestine
pushes the solid into
the rectum.
The poop stays here
until you find a
restroom.
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You're out of here!
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The poop exits
through the anus.
And it leaves with a
flush...
Helpful tips
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Drink water
Eat healthy foods
such as whole
wheat, fiber, fruits,
and vegetables
To help your body
digest your food
easily.
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References
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http://www.bioinfo.mpg.de/euclis/General/images/clockReferences.jpg
Kids Health for Kids. Steven Dowshen
March 2007.
http://kidshealth.org/kid/htbw/digestive_syst
em.html Information retained on February
15, 2009
Discovery Kids website
http://yucky.discovery.com/flash/body/pg000
126.html
http://en.wikipedia.org/wiki/Colon_(anatomy)
http://en.wikipedia.org/wiki/Stomach
http://en.wikipedia.org/wiki/Intestines
Questions?
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