Digestive System Histology and Models

Glands and Tonsils on the Models Submandibular gland Sublingual gland Parotid gland Palatine tonsil Pharyngeal tonsil

Glands Parotid gland Submandibular

Glands Sublingual Submandibular

Pharyngeal tonsil Palatine tonsil

Stomach Fundus region Pyloric region Cardiac region Greater curvature Lesser curvature Body region

Stomach Pyloric sphincter Duodenum Rugae Plicae circularis

PANCREAS AND SPLEEN MODELS Kidney Gall bladder Pancreas spleen (function is to remove foreign antigens and aging RBC’s) duodenum plicae circularis

Duodenum Pancreas Spleen Plicae circularis

Spleen Kidney Pancreas Duodenum Gall bladder Plicae circularis

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

GI Model

Pancreas Duodenum Pyloric sphincter Plicae circularis Stomach Spleen

Ascending colon Descending colon Transverse colon Tenia coli Jejunum Rectum

Ileum Cecum Ileocecal valve Appendix Tenia coli Rectum Plicae circularis

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

Greater Omentum Tenia coli Cecum PancreasDuodenum Jejunum Transverse colon

Tenia coli Mesentery Pancreas Common bile duct Duodenum Appendix Cecum Sigmoid colon (first half) Ascending colon Descending colon

Other half of the Sigmoid colon

Liver Models gall bladder cystic duct common bile duct falciform ligament

Liver CYSTIC DUCT, GALL BLADDER COMMON BILE DUCT (has been cut) Falciform ligament

SLIDES Salivary gland Tongue –taste bud Small Intestine –Villi –Intestinal crypt

Salivary gland

Tongue Taste buds

SLIDES Small intestine –Villi, microvilli, and plicae circularis: (Serve to increase the surface area of the small intestine) –Intestinal crypts

Small Intestine Villus Intestinal crypt

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

Liver Lobules

Liver Lobule Central vein

Liver

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!

Spleen

Red Pulp White pulp

Pancreas Islet of Langerhans (secretes insulin)

Pancreas Acinar cells (secrete enzymes) Islet of Langerhans (secretes insulin)

Glomerulus Tubule Kidney

Pancreas Kidney

Spleen Liver Red Pulp White pulp Central vein