Histology Gireal

HISTOLOGY OF THE GIT

Powerpoint is by Jose Danilo B. Diestro. Picutures are by the entire MDL 9 (D’s and E’s) of UP MED 2013 Warnings: 5. This powerpoint has not been confirmed by Dr. Mantaring because we only had 1 lab session. 6. Read your lab manual as you view this powerpoint (they are in the same order) 7. Not all structures were labeled. 8. This powerpoint lacks a lot of small intestine details and pancreatic ducts.

GIT: Main Histological Layers

Esophagus: Section Through All Layers

Esophagus: Upper Layers

SSE

Lamina Propria

Muscularis Mucosae

Esophageal Glands in Submucosa

Esophagus: Muscularis Externa.

Gastro-Esophageal Junction

Gastro-Esophageal Junction SSE in Esophagus Simple Columnar in stomach

Stomach

Stomach: Fundus

Stomach: Body

Stomach Pylorus:

Stomach: Simple Columnar Epithelium

Stomach: Muscularis Mucosae

Stomach: Submucosa

Stomach: Muscularis Externa

Stomach: Gland Cells

Parietal Cell

Zymogenic Cell

Stomach: Myenteric Plexus of Auerbach

Small Intestine: Duodenum

Brunner’s Glands

Small Intestine: Duodenum

Small Intestine: Ileum Compare with duodenum that DOES NOT HAVE PC. PC also has submucosa at it’s core. While villi only have lamina propria.

Small intestine: Villi Versus Plicae Circulares

Don’t forget that villi are on the luminal surface of plicae circulares! PC is like a “pulled up” version of plain villi taking even the muscularis mucosae and submucosal layer with it.

Villi only (Early Duodenum)

Villi on Plicae Circulares (Late duodenum – Early Jejunum)

Small Intestine: Intestinal Villi

Small Intestine: Intestinal Villi

Small Intestine: Crypt of Lieberkuhn Smaller Blood Vessel in Lamina Propria

Goblet Cell

Enteroendocrine Cell

Paneth Cell Blood Vessel in Submucosa

Muscularis Mucosae

Small Intestine: Crypts of Lieberkuhn

Large Intestine

Large Intestine

Appendix

Appendix

Crypts in the Lamina propria

Appendix: More crypts in the Lamina Propria

Lymphoi d cells

Appendix: Serosa and muscular layers

Serosa

Muscular Layers

Rectum

Crypt Lamina Propria Goblet cells

Muscularis Mucosae

Submucosa

Liver: Glisson’s Capsule

Liver: Overview and Glisson’s Capsule

Glisson’s Capsule

Try to identify the hepatic sinusoids, portal tract, hepatocyte layers (elaborated on next slides)

Liver: Pattern of Central Vein and Portal Tract

Liver: Central Vein and Portal Tract

Liver: Central Vein and Hepatic Tract

Cenral Vein

NOT Hepatic Sinusoid

Liver: Portal Tract

Portal Vein Branch

Biliary Duct

Hepatic Artery Branch

Liver: Portal Tract

Lymphatic Vessel

Hepatic Artery branch

Branch of Portal Vein

Biliary Duct

Liver: Hepatic Sinusoids and Hepatocytes

Hepatocyte

Sinusoid

Liver: Kupffer Cells and Sinusoid lining

Liver: Reticular Fibers

Reticular Fibers

Gall Bladder

Gall bladder

Blood Vessel in Lamina Propria

Simple Columnar Epithelium

Gall Bladder: Rokitansky- Aschoff sinuses

Lamina Propria

Submucosa

Muscular Layers

Blood Vessel in Adventitia

Pancreas

Pancreas: Exocrine Portion

Pancreas

Intralobul ar duct

Interlobular duct

Pancreas

Pancreas

Generalizations on the GIT

Generalizations on the GIT

Generalizations on the GIT

Quiz: What are these structures?

Quiz

2.

1. What is this organ? What is the Yellow Circle encircling 3. How about the green circle

Quiz

1. What parts of the portal tract are seen? 2. What organ has a portal tract? 3. What are entities are stained black?

Quiz

2. What glands in what layer?

1. What organ?

Quiz: What is part of the gall bladder is the pointer in?