What type of system is this?
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Created by: Arlene Barrett, Dennis Bratton, Mariah Gumphry, Haley Vrazel
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Objectives
 Evaluate animals that are monogastric.
 Analyze the components of a monogastric
stomach.
 Interpret the parts and functions of
monogastric digestive system
 Analyze the enzymes in a monogastic
.
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Digestion is the process by which large, complex
nutrient molecules are broken down into simpler
molecules capable of being used by the organism
for food.
4/13/2015
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Humans, swine, rabbits, chickens and horses all
have a simple stomach, which is also known as a
monogastric digestive system.
4/13/2015
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Monogastric
 Carnivores and omnivores
have monogastric digestive
systems.
 Monogastric systems have a
simple stomach structure
and only one compartment.
 Some animals with
monogastric digestive
systems are pigs and rabbits.
Humans also have
monogastric digestive
systems.
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Monogastric Stomach
 Split into 4 parts:
 Esophageal
 Non-glandular
 Connects the stomach to the esophagus
 Cardiac
 Mucus secretion starts here
 Fundic
 Body of the stomach
 Digestion and churning takes place here
 Mucus secretion
 Pyloric
 Connects to small intestines
 Mucus secretion
Monogastric Stomach
 The monogastric stomach is very acidic
 pH drops to 2.0-3.5
 Amylase quits working due to low pH
 Has a mucus lining to protect the stomach
from digesting itself
 Made of smooth muscle to aid in constant
churning/mixing
Monogastric stomach cont.
 HCl is produced, denatures proteins and
prepares them to be broken down
 Pepsinogen is the inactive form of Pepsin
 Pepsin, activated form of Pepsinogen, activated
by HCl
 Pepsin breaks down and digests the denatured
protein
Parts and functions of the monogastric
mammal digestive system continued…
•Small Intestine
-enzymatic digestion and absorption
-Functions of the small intestine: digestion of
proteins, carbohydrates, and fats; absorption of
the end products of digestion
1. duodenum - most digestion occurs here
2. jejunum - some digestion and some
absorption occur
3. ileum - mostly absorption
-Bile - made in liver, stored in gall bladder, active in
the small intestine, emulsifies fat to aid in
digestion
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Parts and functions of the monogastric
mammal digestive system continued…
•Cecum - essentially non-functioning in many
monogastrics. Rabbits and horses have an enlarged
cecum that acts like a rumen and is involved with
microbial digestion (fermentation)
• Large Intestine
-bacterial activity
-water absorption
-waste storage
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Parts and functions of the monogastric
mammal digestive system continued…
•Enzymes in the small intestine
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Video
 Horse’s Digestive System
 http://www.youtube.com/watch?v=8lqk7igz9L4&feat
ure=related
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Review
 Evaluate animals that are monogastric.
 Analyze the components of a monogastric
stomach.
 Interpret the parts and functions of
monogastric digestive system
 Analyze the enzymes in a monogastic
.
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Resources
 Horse’s Digestive System
 http://www.youtube.com/watch?v=8lqk7igz9L4&feat
ure=related
 Resources: Rakowitz-McMillian Sam Houston State
University Animal Science Note Packet
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