Transcript Livestock Digestive Systemsx

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Identify herbivores, carnivores and omnivores
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Discuss the pathway which food travels
through the digestive system.
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Construct a monogastric tract.
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Different species of animals have different
digestive systems due to the food they eat
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These differences allow the animal to gain the
most energy from its digested food
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The 3 types discussed today are:
 Omnivores
 Carnivores
 Herbivores
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Depend on plant
material to survive, such
as grass and leaves
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Some examples of
herbivores are:
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Rabbits
Cattle
Deer
Sheep
Goats
Horses
Have a long and
complex digestive
system to break down
plant matter.
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Depends on other animals as a food source
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Digestive tract is short and simple due to only
consuming meat
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Some carnivores are:
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Cats
Eagles
Mountain Lion
Snakes
Spiders
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Depend on both plant matter and other
animals for food sources
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Some examples of omnivores are:
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Chickens
Pigs
Dogs
Bears
Humans
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The path that most food travels
(monogastric animals):
 Mouth
 Esophagus
 Stomach
 Small Intestine
 Large Intestine
 Rectum
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When eating the mouth works with your
teeth and tongue to crush food while pushing
it down the throat
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While in the mouth the salivary glands
excrete salivary amylase to chemically break
down starch
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The food travels down the esophagus to the
stomach
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Once in the stomach the food will start to
churn while adding hydrochloric acid and
pepsin
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When fully mixed and the food has now
become a chyme mixture then it leaves the
stomach and heads to the small intestine
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When entering the small
intestine the pancreas
excretes digestive
enzymes and stomach
acid-neutralizing
bicarbonate
The liver also aids the
small intestine in
digestion by producing
bile that is stored in the
gall bladder
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Villi are little finger like
folds that help absorb
the nutrients
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The small intestine will
due the most digestion in
3 different areas:
 Duodenum (upper)
 Jejunum (middle)
 Ileum (lower)
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After leaving the small
intestine the remaining food
enters the large intestine
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The large intestine is made
of the colon, cecum, and
rectum
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The colon is broken down
into four sections
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Ascending
Transverse
Descending
Sigmoid
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The cecum is connected by
the entrance from the small
intestine to the ascending
colon
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The cecum helps with the
fermentation of the food
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The ascending and
transverse colon remove the
remaining water
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The descending and sigmoid
colon store food until it is
removed
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This video explains how a horse digest food
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Take notes on what is shown
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http://www.youtube.com/watch?v=8lqk7igz9
L4&feature=related
(7:13)
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Using the craft
supplies that I have
provided, you will
create a monogastric
digestive tract. (you
choose)
 You also need to write
a description of the
pathway and what is
happening at each
step.
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Label each section
when complete:
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Mouth
Esophagus
Stomach
Small intestine
Large intestine
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http://ibdcrohns.about.com/od/ucbasics/g/di
gestivesystem.htm
http://www.qrg.northwestern.edu/projects/m
arssim/simhtml/info/whats-a-herbivore.html
http://www.youtube.com/watch?v=8lqk7igz9
L4&feature=related
http://www.emc.maricopa.edu/faculty/farabe
e/biobk/biobookdigest.html
Pictures: IMSonline.tamu.edu