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ANSC 326 - Non Ruminant Nutrition > Digestive Anatomy and Physiology > Flashcards

Digestive Anatomy and Physiology Flashcards

1
Q

What is the alimentary canal?

A

the tubular passage that extends from mouth to anus and functions in digestion and absorption of food and elimination of residual waste

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2
Q

What are the three mechanisms of digestion?

A
  1. Mechanical action
  2. Chemical action
  3. Enzymatic action
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3
Q

What is the gastrointestinal anatomy of the pig

A
  1. Mouth
  2. Esophagus
  3. Stomach
  4. Duodenum
  5. Ileum
  6. Jejunum
  7. Cecum
  8. Colon
  9. Rectum
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4
Q

What is retention time of digesta for pig? For chickens?

A

Pigs: 12-48 hrs
Chickens: 3-6 hrs

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5
Q

What is the gastrointestinal anatomy of the chicken?

A
  1. Beak
  2. Crop
  3. Proventriculus (stomach)
  4. Gizzard
  5. Duodenum
  6. Ileum
  7. Jejunum
  8. Ceca
  9. Colon
  10. Cloaca
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6
Q

Mouth function

A

a. mastication
b. produces saliva
c. adds moisture, mucus, and salivary amylase

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7
Q

Esophagus

A

peristalsis contractions

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8
Q

Pancreas function

A

Exocrine: secretes bicarbonate, lipases, amylase, nucleases, trypsinogen, chymotrypsinogen, procarboxypeptidase

Endocrine: secretes insulin and glucagon

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9
Q

Liver function

A

produces bile and bile salts

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10
Q

Gallbladder function

A

stores and secretes bile

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11
Q

Stomach function

A

a. secretes HCl
b. secretes pepsinogen
c. some mechanical digestion

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12
Q

Duodenum function

A

liver and pancreatic secretions enter here through the common bile duct

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13
Q

Jejunum function

A

does most absorption of nutrients

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14
Q

Ileum function

A

some absorption

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15
Q

Cecum function

A

microbial fermentation

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16
Q

Colon Function

A
  1. water reabsorption
  2. fermentation
17
Q

Crop function

A
  1. storage
  2. moistening of feed
  3. microbial activity
18
Q

Proventriculus function

A

similar to stomach

19
Q

Gizzard function

A

site of mechanical digestion

20
Q

Cloaca function

A
  1. excretion of pooled feces and urine
  2. reproduction
21
Q

What is the pH of the stomach?

A

3-5

22
Q

What is the pH of the small intestine? Why is it different?

A

6-8. Protect the lumen of the small intestine and activate more enzymes

ANSC 326 - Non Ruminant Nutrition (14 decks)

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