histology gireal

8/14/2019 Histology GIReal

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HISTOLOGY OF THE GIT

Powerpoint is by Jose Danilo B. Diestro. Picutures are by the entire MDL 9 (Ds and Es) 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.


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GIT: Main Histological Layers


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Esophagus: Section Through All Layers


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Esophagus: Upper Layers

SSE

Lamina

Propria

Esophageal

Glands in

Submucosa

MuscularisMucosae


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Esophagus: Muscularis Externa.


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Gastro-Esophageal Junction


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Gastro-Esophageal Junction

SSE in

Esophagus

Simple Columnar

in stomach


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Stomach


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Stomach: Fundus


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Stomach: Body


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Stomach Pylorus:


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Stomach: Simple Columnar Epithelium


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Stomach: Muscularis Mucosae


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Stomach: Submucosa


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Stomach: Muscularis Externa


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Stomach: Gland Cells

Parietal

Cell

ZymogenicCell


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Stomach: Myenteric Plexus of Auerbach


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Small Intestine: Duodenum

Brunners Glands


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Small Intestine: Duodenum


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Small Intestine: Ileum

Compare with duodenum that DOES NOT HAVE PC.PC also has

submucosa at its core. While villi only have lamina propria.


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Small intestine: Villi Versus Plicae Circulares

Dont 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)


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Small Intestine: Intestinal Villi


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Small Intestine: Intestinal Villi


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Small Intestine: Crypt of Lieberkuhn

Goblet

Cell

Paneth

Cell

Enteroendocrine

Cell

Blood Vessel inSubmucosa

Muscularis

Mucosae

Smaller Blood Vessel

in Lamina Propria


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Small Intestine: Crypts of Lieberkuhn


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Large Intestine


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Large Intestine


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Appendix


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Appendix

Crypts in the Lamina

propria


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Appendix: More crypts in the Lamina Propria

Lymphoid cells


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Appendix: Serosa and muscular layers

Serosa

Muscular

Layers


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Rectum

Goblet

cells

Muscularis

Mucosae

Submucosa

Crypt

Lamina

Propria


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Liver: Glissons Capsule


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Liver: Overview and Glissons Capsule

Glissons

Capsule

Try to identify the hepatic sinusoids, portal

tract, hepatocyte layers (elaborated on next

slides)


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Liver: Pattern of Central Vein and Portal Tract


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Liver: Central Vein and Portal Tract


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Liver: Central Vein and Hepatic Tract

CenralVein

NOT Hepatic

Sinusoid


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Liver: Portal Tract

Portal Vein Branch

Hepatic

Artery

Branch

Biliary

Duct


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Liver: Portal Tract

Lymphatic

Vessel

Branch of

Portal Vein

Hepatic

Artery

branch

Biliary

Duct


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Liver: Hepatic Sinusoids and Hepatocytes

SinusoidHepatocyte


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Liver: Kupffer Cells and Sinusoid lining


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Liver: Reticular Fibers

Reticular

Fibers


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Gall Bladder


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Gall bladder

Blood Vessel in

Lamina Propria

Simple Columnar

Epithelium


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Gall Bladder: Rokitansky- Aschoff sinuses

Blood Vessel in

Adventitia

Submucosa

Muscular

Layers

Lamina

Propria


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Pancreas


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Pancreas: Exocrine Portion


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Pancreas

Interlobular

duct

Intralobul

ar duct


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Pancreas


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Pancreas


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Generalizations on the GIT


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Quiz:What are these structures?


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Quiz

1. What is this organ?2. What is the Yellow Circle encircling

3. How about the green circle


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Quiz

1. What parts of the

portal tract are seen?2. What organ has a

portal tract?

3. What are entities are

stained black?


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Quiz

1. What

organ?

2. What glands in

what layer?


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

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