Download Digestive system intro

The digestive System
Facts about the digestive system
How much saliva does the human mouth produce everyday?
1.7 liters
How many different species of bacteria are present in the
digestive tract?
Around 400
How much hydrochloric acid does the human stomach
produce everyday?
2 liters
Every day people eat food. Some of the
waste in the body.
food becomes ________
Before getting rid of the wastes, the body
_______________
out the useful nutrients.
separates
breaking
Digestion is the process of ______________
down food into simple substances your
body can use.
The starting point of the
digestive system is the
mouth
____________.
As you
grind up the food with
salivary ________
glands
your teeth, ________
produce saliva, which break down the chemicals
in the food a bit. This allows the food to become
swallow
tongue
mushy and easy to __________.
Your __________
pushes the tiny bits of food toward the back of
your throat.
The second part of the
digestive tract is the
______________.
It is like
esophagus
a stretchy pipe (about
10 inches long) that
moves food from the
back of the throat to the
____________.
stomach The
muscles of the
esophagus slowly
squeeze the food into
the stomach, which
takes about 2-3 seconds.
mixer
The stomach is like a ________,
churning and mashing together
all the small bits of food into
smaller and smaller pieces. It
does this with help from the
strong muscles in the walls of
gastric
the stomach and _________
juices. These juices also help
kill bacteria that may have been
in the eaten food.
The stomach has three important jobs:
store
*To
_______ the food you’ve eaten
*Tobreak
_______down
________ the food into a liquidy mixture
*To empty to mixture into the _______
small ___________
intestine
The small intestine is a long tube
22 feet long packed
about _____
beneath the stomach. It breaks
down the food mixture even
more so your body can absorb all
the vitamins, minerals, proteins,
carbohydrates, and fats. Food can
stay in the small intestine for 4 to
5 hours while it digests. This is possible with help from the
pancreas _______,
liver and ______
gall __________,
bladder which all
_____________,
send digestive juices to different parts of the small
intestines.
The pancreas makes most of the
juices that help the body digest
_______
fats and _____________.
proteins
Gastric juices from the liver are
bile which helps to
called _______,
absorb fats into the bloodstream.
The liver also filters out harmful
wastes turning them into more bile.
It also helps figure out how many
nutrients will go to the rest of the
body, and how many will stay
behind in storage.
The gallbladder serves as a
warehouse for bile, storing it
______________
until the body needs it.
Once food leaves the small intestine, it enters the
large ___________.
intestine It is a tube about 5 feet long. It has a
_______
larger diameter than the small intestine. Remaining water
and nutrients are removed, and the left over waste- parts of
the food that your body can’t use- are moved to the
rectum which is the last part of the digestive tract. The
__________,
anus
solid waste stays here until it is pushed through the _________.