Transcript Everybody Poops

Everybody Poops
An introduction to your digestive
system
Functions of the Digestive
System
• Breaks down food molecules the body
can use.
• Molecules are absorbed into blood and
carried through the body.
• Eliminates wastes.
Two Types of Digestion
• Mechanical
• Food is physically broken down into
smaller pieces.
• Chewing
• Chemical
• Chemicals made by your body break down
foods.
• Stomach acids and enzymes
Your Digestive System
• It is about 9 meters long from beginning
to end.
• You make 1 to 3 pints of saliva per day!
• The average male will eat about 50 tons
of food during his lifetime in order to
sustain a weight of 150 lbs
• Does it really take 7 years to digest
chewing gum?
Where does the food go?
•
•
•
•
Mouth
Esophagus
Stomach
Small
Intestine
• Large
Intestine
• Out of the
anus through
the rectum.
Mouth
• Mechanical
Digestion
• Chewing
• Chemical Digestion
• Saliva
Esophagus
• Muscular Tube
• Connects mouth and stomach.
• Food stays for only 10 seconds.
• Food moves by peristalsis
• Involuntary waves of muscle contraction.
Stomach
• A J-shaped muscular pouch
• It expands as you eat
• Average adult volume: 2 liters
• Mechanical digestion
• Churning
• Chemical digestion
• Digestive juices
• Hydrochloric acid
Small Intestine
• About 6 meters long
(22ft)
• Most chemical
digestion occurs.
• Most absorbtion of
nutrients.
Large Intestine
• The last section
• About 1.5 meters long
(bathtub)
• Water absorbed into
blood
• Other waste readied for
elimination.
• Ends at the rectum
• Material is compressed
into solid form.
Other Organs
• Liver
• Produces bile
• A chemical that
aids in digestion
• Pancreas
• Produces
digestive
enzymes
mouth
Review
esophagus
stomach
• Digestive
Order
large
intestine
small
intestine
rectum
Review
• What kind(s) of digestion are utilized by
the mouth? The stomach?
• About how long is the small intestine?
• Where does the most absorption of
nutrients occur?
• Where is the waste readied for
elimination?
• About how long is your digestive
system?