Transcript Large Intestine - cloudfront.net

Oral
cavity
Pharynx
Liver
Esophagus
Stomach
Gall Bladder
Pancreas
Large
Intestine
Small
Intestine
• Function: Break down
food into molecules
that can used by cells
• Enzymes, acids,
hormones, bile aid in
breakdown
• Sphincters (ring of
muscle) separate
sections
• Nutrients passed into
the circulatory system
to be distributed in the
blood
Click pic to play
Click pic to play
Oral
cavity
• Mechanical
digestion: Teeth
grind food
• Chemical
digestions: Saliva
(amylase) begins to
breakdown starches
• Bolus is created
(ball of chewed &
moistened food)
Click pic to play
Pharynx
• Epiglottis seals off
the trachea
• Bolus pushed
down the
esophagus by the
tongue
Esophagus
• Connects mouth
with stomach
• Peristalsis:
Muscular movement
pushes food along
– Bolus pushed down
the esophagus by
muscles
Click pic to play
Stomach
Click pic to play
• Function: Prepares
food for absorption
• Chemical digestion
– Pepsin (enzyme)
digests proteins
– Stomach acids mix
• Mechanical digestion
– Muscles contract to
churn the bolus (~4
hours)
• Chyme created: pastelike mixture of food,
enzymes, acids
• Peristalsis pushes
chyme through
sphincter
Small
Intestine
• Function: Absorption of
nutrients
• Duodenum
– Chemical digestion:
Enzymes from the liver,
gallbladder, pancreas
released to aid digestion
– Mechanical digestion:
Muscular contractions mix
& churn the chyme
• Peristalsis pushes the chyme
along
• Nutrients absorbed into the
capillaries of the s. intestine
Click pic to play
Liver
Gall Bladder
• Functions:
– 1) Break down toxic chemicals (alcohol)
– 2) Produces bile to break down fats
• Gall Bladder: Stores bile until chyme moves into duodenum
Click pic to play
Pancreas
Click pic to play
• Functions:
– 1) Release enzyme into duodenum to break down starches &
lipids
– 2) Releases insulin into the blood (diabetes)
Large
Intestine
• AKA: Colon
• Peristalsis continues to
push the chyme
• Remaining water is
absorbed from the
chyme
– Undigested material
solidifies (feces)
• Nutrients from bacteria
absorbed
• Feces exits the body
through the rectum &
anus
• The liver is labeled which
letter?
L
• K
• The pancreas is labeled
which letter?
L
• D
L
• Which letter begins the
process of chemical
digestion?
• L (salivary glands)
• Most nutrients are absorbed
at which organ?
L
• E (small intestine)
• Which organ produces bile
to help digest fats?
L
• K (liver)
L
• Which organ absorbs water
from chyme to solidify
waste?
• F (large intestine)
L
• Which organ is the location
where the gall bladder and
pancreas release fluids to
mix with the chyme?
• I (Duodenum)
Label the letters of the diagram
L
A = esophagus
B = I don’t care
C = stomach
D = pancreas
E = Small intestine
F = Large intestine
G = Rectum
H = appendix
I = duodenum
J = gall bladder
K = liver
L = salivary glands