Transcript digestive system

WHAT DO YOU KNOW ABOUT IT?
DIGESTIVE SYSTEM
How long is it?
How long does digesting take?
“20-30 hours”
What is the purpose of the D.S.?
How long does it take to digest your food?
Mouth
Is Mechanical
digestion
 Teeth – Cuts
or Grinds the
food
 Helps you to
swallow


Saliva water, breaks
down the food
through
ENZYMES –
break down
starches into
glucose
1. Balls
food to the
back of the
mouth
2. Helps
you
swallow
3. taste
tongue
pharynx
Opening
to the
throat
Esophagus
12 inches long
Muscles push food
down..
Like a Snake
EPIGLOTTIS
flap that blocks food
and water from going
into the lungs.
Stomach
Is Chemical Digestion
3-6 hours
Lined in
MUCUS
(Protects From ACID)
Growling is Empty –
Stomach Muscles are
Contracting
GASTRIC JUICES
1.HYDROCHLORIC
–
ACID:
Protects you from bacteria
2. ENZYMES:
Break down proteins and carbs into
something …called
BREAKS THE FOOD INTO CHYME
CHYME GOES TO THE SMALL
INTESTINE
MAIN FUNCTION OF THE
STOMACH… BREAK THE FOOD
DOWN…LIKE A FOOD PROCESSOR
SMALL INTESTINE 3-5 hours
18 – 23 FEET LONG
1 inch in diameter
Function:
1 Chemical Digestion
2 Absorption of Nutrients
are completed
Villi
= Tiny fingers
contains tiny blood
vessels(capillaries) absorb
nutrients into the blood
stream
Tennis court worth of
absorbing power.
5 feet long
2.5 inches in
diameter
Large intestine
Fiber and other
materials that are not
broken down go here
and absorbed
Water absorbed into
intestinal wall
Chyme …becomes FECES
Rectum
anus
Final phase of
the digestive
system.
Feces comes
out of the
rectum
Kidneys
The filter system of
the body.
Kidneys filter waste
out of the blood and
most liquid is reabsorbed into the
blood stream.
1% is not useful
and goes to the
bladder as urine.
LIVER
It acts as a warehouse where the
blood takes all the nutrients.
Weights 3 ½ pounds
Produces BILE = breaks down fat
(remember fat does not dissolve in blood or
water)
BILE
Made in the Liver
1.
Sent to the Gallbladder
2. To the small Intestine and breaks down fat.
3. Then takes FAT to the walls of the Sm. Int.
and absorbed into the blood stream
Pancreas

Makes insulin – and helps regulate sugar
levels

Makes Enzymes that react to the chyme
Gallbladder
Stores Bile and sends it to the
small intestine
(acts as a warehouse)
Tips to take care
of D.S.
1.
2.
3.
4.
Chew slowly
Brush and Floss
Exercise
Nutritious food…fiber foods
