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DIGESTIVE SYSTEM
(27 FEET OF GASTROINTESTINAL
FUN)
Parts and Functions
Parts of Digestive (GI) Tract
A.
Mouth – breaks food into
smaller pieces, mixes with
slippery saliva
B.
Pharynx – (throat) moves
food from mouth
C.
Esophagus – Squeezes
food down to the stomach by
using peristalsis –(muscle
contractions to move food)
Parts of Digestive (GI) Tract
D.
E.
F.
Stomach – squeezes the
food, acid and enzymes
break down food into
soupy mixture called
chyme
Small Intestine – absorbs
nutrients through villi
(finger-like projections)
Large Intestine – water is
absorbed from
undigested food
Parts of Digestive (GI) Tract
G. Rectum – stores waste
H. Anus – eliminates waste
More Parts…
A.
B.
C.
D.
Salivary Glands –
amalyse breaks down
carbohydrates
Liver – makes bile to
breaks down fat, stores
nutrients, breaks down
toxins
Gall Bladder – stores
bile from liver
Pancreas – makes
neutralizing liquid and
insulin
Mrs. Sime’s Top Five Things That
Break It Down.
5. Saliva (amylase) – breaks down carbohydrates
4. Pepsin – breaks down proteins
3. Insulin – breaks down sugar
2. Bile – breaks down fats
1. Will it be YOU?!?!?!?!
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What is being
digested?
Part
Function
Mouth
Chewing
Starts break down
food
Sesame- Seed
bun
Esophagus
Pushes food
Beef patties
Cheese
Stomach
(3-6 hours)
Mixes food
HCl breaks down food
Muscles/ Enzymes Used and
Function
Mechanical
and/or
Chemical
Amylase: breaks down carbs
Both
Sphincter: prevents food from
leaving
Peristalsis: muscular
contractions
Epiglottis: flap of tissue covers
trachea
Acid: mixes with food to make
chyme
Mechanical
Both
Pepsin: breaks down proteins
Cheese
Special Sauce
Lettuce
Pickles
Onions
Fat
Small Intestine
(3-5 hours)
*pancreas
*liver
*Gall bladder
Villi: network of blood vessels
Absorbs of nutrients Bile: breaks down fat
and puts into blood
Insulin: breaks down sugar
stream
Large Intestine Absorbs leftover
(18-24 hours) water in undigested
food
Mechanical
** Accessory
organs are
Chemical
Mechanical