Download Digestive Systems

Digestive Systems
Animal Science I
Types of systems
 Ruminant
 Cows
and goats
 Monogastric
 Horses
(Non-ruminant)
and pigs
 Chickens (some variation)
Types of Systems
 Are
humans different from animals?
 Why?
 Different
diets require different systems.
Ruminant System
 Mouth
– bites and chews food
 Esophagus
 Four
– connect mouth to stomach
part stomach
 Rumen
 Reticulum
 Omasum
 Abomasum
Ruminant System
 Rumen
 Largest
part
 Bacteria
change roughages into amino
acids
 Major
digestion take place
Ruminant System
 Reticulum
 Where
 Goes
 Acts
liquids go
here after chewing cud
as a filter
Ruminant System
 Omasum
 Grinds
and squeezes food
 Removes
some liquid
Ruminant System
 Abomasum
 True
stomach
 Enzymes
 Rumen
finish digestion
and Reticulum make up 85%
of capacity
Ruminant System
 Small
Intestine
 Food
is mixed with bile, pancreatic juice
and intestinal juice
 Main
absorption takes place in small
intestine

Villi –little straws
Villi
Ruminant System
 Large
Intestine
 Main
purpose is to absorb water
 Adds
mucus to waste (feces)
Monogastric System
 Mouth
– same as ruminant
 Esophagus
– same as ruminant
 Stomach
 churns
and mixes feed
 Major digestion
Monogastric System
 Small
Intestine
 villi
in SI absorb nutrients
 Mixes with bile and juices
 Liver
 Produces
bile (breaks down fat)
Monogastric System
 Large
Intestine – same as ruminant
 Non-ruminants
cannot eat and digest as
much roughages as ruminants
Monogastric (Chicken)
 Mouth
 No
teeth – eat food whole
 Esophagus
 Crop
 Stores
food
Monogastric (Chicken)
 Gizzard
 Crushes
feed and mixes with juices
 Contains grit and gravel
 Proventriculus
 Considered
the true stomach
Monogastric (Chicken)
 Liver
 Bile
 Small
that breaks down fat
Intestine
 Main
absorption
Monogastric (Chicken)
 Large
Intestine
 Absorbs
water, mixes with mucus
 Vent
 Anus
 Things
– both solid and liquid waste
are different because of no teeth