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Animal Science Digestive Systems - PowerPoint PPT Presentation


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Animal Science Digestive Systems. Chickens. Pigs. Beef Cattle. Dairy Cattle. Horses. Turkeys. Dogs. Goats. Sheep. Rabbits. Cats. Ostrich. Deer. Types of Digestive Systems. Hind Gut Fermentors. Avian. Monogastrics. Ruminants. Pigs. Dogs. Cats. Monogastrics.

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Animal Science Digestive Systems


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Presentation Transcript
slide1

Animal Science

Digestive Systems

slide2

Chickens

Pigs

Beef Cattle

Dairy Cattle

Horses

Turkeys

Dogs

Goats

Sheep

Rabbits

Cats

Ostrich

Deer

Types of Digestive Systems

Hind Gut Fermentors

Avian

Monogastrics

Ruminants

slide3

Pigs

Dogs

Cats

Monogastrics

  • One compartment stomach
  • Cannot digest grass or hay
  • Secretes acid and enzymes that digest food
  • Need high energy diets

Humans

slide4

Liver

Pancreas

Cecum

Rectum

Esophagus

Stomach

Duodenum

Colon

Small intestine (jejunum, ileum)

Digestive Tract - Pig

slide5

Organs of Digestive System

Monogastrics

  • Mouth
    • Mechanical breakdown of foodstuffs by chewing
    • Saliva added as a lubricant and begins digestion.
  • Esophagus
    • Tube connecting the mouth to the stomach.
slide6

Organs of Digestive System

Monogastrics

  • Stomach
    • Enzymatic digestion of proteins begins.
    • Food reduced to liquid form.
  • Liver
    • Center of metabolic activity in the body.
    • Provides bile salts to small intestine (needed for digestion and absorption of fats).
slide7

Organs of Digestive System

Monogastrics

  • Pancreas
    • Provides digestive enzymes to the small intestine to help in digestion of fats, carbohydrates, and proteins.
  • Small Intestine
    • 3 sections – duodenum, jejunum, ileum
    • Site of final stages of chemical enzymatic digestion.
    • Where almost all nutrients are absorbed.
slide8

Organs of Digestive System

Monogastrics

  • Large Intestine
    • 3 sections – cecum, colon, rectum
    • Site of water absorption
    • Feces formed.
slide9

Chickens

Turkeys

Avian

  • Considered monogastric
  • One compartment stomach
  • Cannot digest grass or hay
  • Secretes acid and enzymes that digest food
  • Need high energy diets
slide10

Gall bladder

Liver

Cecum

Gizzard

Esophagus

Crop

Proventriculus

Cloaca

Pancreas

Large intestine

Duodenum

Small intestine (jejunum, ileum)

Digestive Tract - Poultry

slide11

Organs of Digestive System

Avian

  • Beak
    • No lips, no teeth, and no chewing.
  • Crop
    • Pocket of the esophagus that provides storage for consumed food.
    • Food is moistened and softened
slide12

Organs of Digestive System

Avian

  • Proventriculus
    • Glandular stomach adds digestive juices
  • Gizzard
    • Grinds and breaks up food.
    • May contain grit (small stones) eaten by bird.
slide13

Organs of Digestive System

Avian

  • Cloaca
    • Common chamber into which the digestive, urinary, and reproductive tracts open.
slide14

Beef Cattle

Dairy Cattle

Goats

Sheep

Deer

Ruminants

  • Most herbivores
  • Fore-gut fermentation vat for grass and hay
  • Four compartment stomach (not four stomachs)
  • Chews cud
slide15

Small intestine

Rumen

Rectum

Pancreas

Omasum

Esophagus

Large intestine

Reticulum

Abomasum

Cecum

Liver

Gall bladder

Digestive Tract - Cattle

slide16

Organs of Digestive System

Ruminants

  • Mouth, esophagus, liver, pancreas, small intestine, and large intestine have functions similar to monogastrics.
  • Stomach
    • Multi-compartmented stomach – rumen, reticulum, omasum, abomasum.
slide17

Parts of the Ruminant Stomach

  • Rumen:
    • Largest compartment
    • “Fermentation Vat”
    • Digests forages
slide18

Parts of the Ruminant Stomach

  • Rumen (continued):
    • Lined with millions of papillae (short projections on wall of rumen) needed for absorption.
      • “Shag carpet” appearance
slide19

Parts of Ruminant Stomach

  • Reticulum:
  • Contains microorganisms (like the rumen).
  • Catches non-digested material.
  • “The Honeycomb”
    • Catches and holds hardware consumed by animal.
    • Hardware can be removed with rumen magnet.
slide20

Parts of Ruminant Stomach

  • Omasum:
    • “The Book”
    • A heavy, hard organ with a lining that has many folds
  • Function not well understood.
    • Filters large particles back to reticulum
    • Absorbs water
slide21

Organs of Digestive System

Monogastrics

  • Abomasum:
    • “True Stomach”
      • Similar to monogastric or human stomach
    • Digests grains and breaks down proteins
slide22

Horses

Rabbits

Ostrich

Hind-gut Fermenters

  • One simple, glandular stomach
  • Hind-gut fermenter (Cecum) digests plant fiber
  • Must graze often
  • Must have fiber (grass or hay)
slide23

Small intestine

Rectum

Cecum

Esophagus

Stomach

Small colon

Duodenum

Large colon

Digestive Tract - Horse

slide24

Organs of Digestive System

Hind-Gut Fermentors

  • Mouth, esophagus, stomach, liver, pancreas, and small intestine have similar functions as compared to monogastrics.
  • Cecum
    • Large and complex compared to monogastrics and ruminants.
    • Cecum similar to rumen in ruminants
      • Fermentation vat
      • Microbes to break down fiber
slide25

Digestive Tract Type?

Liver

Pancreas

Cecum

Rectum

Esophagus

Stomach

Duodenum

Colon

Small intestine (jejunum, ileum)

slide26

Digestive Tract Type?

Gall bladder

Liver

Cecum

Gizzard

Esophagus

Crop

Proventriculus

Cloaca

Pancreas

Large intestine

Duodenum

Small intestine (jejunum, ileum)

slide27

Digestive Tract Type?

Small intestine

Rumen

Rectum

Pancreas

Omasum

Esophagus

Large intestine

Reticulum

Abomasum

Cecum

Liver

Gall bladder

slide28

Digestive Tract Type?

Small intestine

Rectum

Cecum

Esophagus

Stomach

Small colon

Duodenum

Large colon