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ObjectivesEvaluate 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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04/19/23 5
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.
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Humans, swine, rabbits, chickens and horses all have a simple stomach, which is also
known as a monogastric digestive system.
MonogastricCarnivores 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 StomachSplit into 4 parts:Esophageal
Non-glandularConnects the stomach to the esophagus
CardiacMucus secretion starts here
FundicBody of the stomachDigestion and churning takes place hereMucus secretion
PyloricConnects to small intestinesMucus secretion
Monogastric Stomach The monogastric stomach is very
acidicpH drops to 2.0-3.5Amylase quits working due to low pHHas a mucus lining to protect the
stomach from digesting itselfMade 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
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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
ReviewEvaluate 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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