Transcript DIGESTIVE SYSTEM

DIGESTIVE
SYSTEM
The digestive system makes nutrients
available to all body cells.
Any food you eat must be broken down
into nutrients that your cells can use.
Your digestive system does this job, which
is called DIGESTION.
DIGESTION is the process that breaks
food into forms that your cells can use.
DIGESTIONS begins in the
As soon as you bite food, your digestive
system starts working!!
PARTS OF THE
DIGESTIVE SYSTEM
Mouth
Esophagus
Stomach
Small Intestine
Large Intestine
DIGESTION begins in your
mouth.
Your teeth and chemicals
in your saliva start to break
down the food.
The food you swallow
enters a tube called the
esophagus.
The esophagus is about 25
cms long. Smooth muscles
in its walls contract and
move the food toward the
stomach.
Esophagus
Then, the partly
digested food enters
your stomach.
Muscles in the walls of
your stomach mash
the food. They mix it
with juices until it is a
thick liquid.
Muscles then push the
food into the small
intestine.
The small intestine is a
twisted tube that is
about 7 meters long.
Most digestion takes
places during the 3 to
6 hours that food
stays here.
Juices break the food
into nutrients.
Anything that can not
be digested and
some liquid move into
the large intestine. It
is about 1.5 meters
long.
It removes the liquid
and stores the solid
waste until it leaves
the body.
THE DIGESTIVE SYSTEM
THE DIGESTIVE SYSTEM