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Page 1: Digestive System  Histology and Models

Digestive System Histology and Models

Page 2: Digestive System  Histology and Models

Glands and Tonsils on the Models

• Submandibular gland

• Sublingual gland

• Parotid gland

• Palatine tonsil

• Pharyngeal tonsil

Page 3: Digestive System  Histology and Models

Glands

• Parotid gland

• Submandibular

Page 4: Digestive System  Histology and Models

Glands

Sublingual

Submandibular

Page 5: Digestive System  Histology and Models

Pharyngeal tonsil

Palatine tonsil

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StomachFundus region

Pyloric region

Cardiac region

Greater curvature

Lesser curvature

Body region

Page 7: Digestive System  Histology and Models

Stomach

Pyloric sphincter

Duodenum

RugaePlicae circularis

Page 8: Digestive System  Histology and Models

PANCREAS AND SPLEEN MODELS

• Kidney• Gall bladder• Pancreas• spleen (function is to remove foreign antigens

and aging RBC’s) • duodenum• plicae circularis

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Duodenum

Pancreas

Spleen

Plicae circularis

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Spleen

Kidney

Pancreas

Duodenum

Gall bladder

Plicae circularis

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GI MODEL• Stomach• Pancreas• Spleen• Pyloric sphincter • circular folds (known as plicae circularis; these are macroscopic folds in the

mucosa)• ascending colon• transverse colon• descending colon• tenia coli• Jejunum (middle part of small intestine)• Ileum• Cecum• Ileocecal valve• Appendix• Rectum•  NOTE: Plicae circularis, microvilli, and villi all increase the surface area of

the small intestinal lining

Page 12: Digestive System  Histology and Models

GI Model

Page 13: Digestive System  Histology and Models

Pancreas

Duodenum

Pyloric sphincter

Plicae circularis

Stomach

Spleen

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Ascending colon

Descending colon

Transverse colon

Tenia coli

Jejunum

Rectum

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Ileum

Cecum

Ileocecal valve

Appendix

Tenia coli

Rectum

Plicae circularis

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INTESTINE MODEL• Stomach• Pancreas• Spleen• Pyloric sphincter • circular folds (known as plicae circularis; these are macroscopic folds in the

mucosa)• ascending colon• transverse colon• descending colon• tenia coli• Jejunum (middle part of small intestine)• Ileum• Cecum• Ileocecal valve• Appendix• Rectum•  NOTE: Plicae circularis, microvilli, and villi all increase the surface area of

the small intestinal lining

Page 17: Digestive System  Histology and Models

Greater OmentumTenia coli

Cecum

PancreasDuodenum

Jejunum

Transverse colon

Page 18: Digestive System  Histology and Models

Tenia coli

Mesentery

Pancreas

Common bile duct

Duodenum

Appendix

CecumSigmoid colon (first half)

Ascending colon

Descending colon

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Other half of the Sigmoid colon

Page 20: Digestive System  Histology and Models

Liver Models

• gall bladder

• cystic duct

• common bile duct

• falciform ligament

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LiverCYSTIC DUCT, GALL BLADDER

COMMON BILE DUCT (has been cut)

Falciform ligament

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SLIDES

• Salivary gland

• Tongue– taste bud

• Small Intestine– Villi– Intestinal crypt

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Salivary gland

Page 24: Digestive System  Histology and Models

Salivary gland

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TongueTaste buds

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SLIDES

• Small intestine – Villi, microvilli, and plicae circularis: (Serve to

increase the surface area of the small intestine)

– Intestinal crypts

Page 27: Digestive System  Histology and Models

Small Intestine

Villus

Intestinal crypt

Page 28: Digestive System  Histology and Models

SLIDES

• Liver: the functional unit of the liver is the lobule.– central vein

Page 29: Digestive System  Histology and Models

Liver Lobules

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Liver Lobule

• Central vein

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Liver

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SLIDES

• Spleen: removes foreign antigens and aging RBC's– Red pulp– White pulp

• Pancreas– Islets– Acini

– Be able to tell the difference between liver, spleen, pancreas, and kidney slides!

Page 33: Digestive System  Histology and Models

Spleen

Page 34: Digestive System  Histology and Models

Spleen

Red Pulp

White pulp

Page 35: Digestive System  Histology and Models

PancreasIslet of Langerhans (secretes insulin)

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Pancreas

Acinar cells (secrete enzymes)

Islet of Langerhans (secretes insulin)

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Glomerulus

TubuleKidney

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Pancreas Kidney

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Spleen Liver

Red Pulp White pulp Central vein


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