GIT ~ Histology Flashcards
4 layer of GI Tract From Inside to Outside
Mucosa
Sub-Mucosa
Muscularis Externa
Serosa/Adventitia
Lip to Esophagus ________________ Epithelium
Stratified Sqaumous Non Keratinized Epithelium
3 Layers of Mucosa
Epithelial Layer
Lamina Propria
Muscularis Interna
Hard Palate & Gingiva lined by __________________ Epithelium
Para-keratinised Stratified Sqaumous Epithelium ~ has Nucleus
Difference between Keratinised and Para-Keratinised Epithelium
In para-keratinised Nucleus is Present whereas in keratinised ~ absent
Epithelium in
Stomach ~
Small Intestine ~
Stomach ~ Simple Columnar Epithelium
Small Intestine ~ Simple Columnar with Microvilli
Epithelium in Large Intestine Upto Pectinate Line ~
Simple Columnar Epithelium
Epithelium in Large Intestine from Pectinate Line to Hilton’s line
Stratified Squamous Non Keratinised Epithelium
Epithelium in anal canal Below Hilton’s Line
Stratified Squamous Keratinised Epithelium
GALT present in which layer
Lamina Propria
In the Ileum Payer’s Patches Present in Lamina Propria
Pyloric and Cardiac Glands of Stomach present in which layer
Lamina Propria
Lamina Propria Contains
Connective Tissues
GALT
Intestinal Gland
Pyloric and Cardiac Glands of Stomach
Strongest layer of GIT
SubMucosa
Contains;
Meissner’s Plexus
Bruner’s Gland (Duodenum)
Esophageal Gland
Bruner’s Gland in Duodenum and
Esophageal Gland present in which layer
Sub Mucosa
Muscularis Externa Of Esophagus
Upper 1/3
Middle 1/3
Lower 1/3
Upper 1/3 ~ Skeletal Muscle
Middle 1/3 ~ Skeletal + Smooth
Lower 1/3 ~ Smooth Muscle
Auerbach Plexus present in which layer
Muscularis Externa
Parts of Gastric Gland
Neck ~ Mucous Neck Cells
Body ~ Parietal / Oxyntic Cells
Fundus ~ Chief / Peptic Cells
Parietal / Oxyntic Cells Secretes
HCl and Intrinsic Factor
Eosinophilic cells with Round nucleus
Argentaffin cells found in which part of Gastric Gland
Fundus of Gland
Neuroendocrine Cell ~ Secrets Gastrin Hormone
Stained by Silver Salts
Which part of the stomach has all cells
Fundus of the Stomach
All cells
Mucous neck cell
Argentaffin cell
Parietal cell
Chief cell
Cells in the Fundus of gland
Chief cells
Argentaffin cells
Basophilic cells which secrets pepsinogen
Chief Cells
Cells present in Crypts of Liberkuhn of small Intestine
Stem Cells ~ Produce Enterocytes and Goblet Cells
Peneth Cells
M Cell
Cells in Crypt of Liberkuhn migrate from the base towards apex
Enterocytes and Goblet Cells
Cells in Crypt of Liberkuhn migrate from Apex towards the Base
Peneth Cells
Contains Eosinophilic Granules in Apex (apical eosinophilia)
Contain Lysosome
Phagocytic in Function
Antigen Presenting Cells in Crypt of Liberkuhn
M Cells
Part of Duodenum has More No of Brunner’s Gland
Proximal Part of Duodenum
submucosa ~
Has more no of Brunner’s gland ~ to neutralise the highly acidic incoming stomach content
Mucous neck cells absent in small intestine
Correct/Incorrect
Correct
Instead Mucous Neck Cell it has Goblet Cells in small and large intestine
Shape of hepatic lobule
Hexagonal Shape
In the centre of hepatic lobule we have
Central Vein
At the corner of Hepatic lobule we have
Portal Triad ~
consists of Portal Vein
Hepatic Artery
Bile Duct
Blood from the Portal Vein and Hepatic Artery Drains into
Sinusoids ~ Central Vein ~ Hepatic Venules ~ Hepatic Vein ~ Inferior Vena Cava
Kupffer cells present in the
Sinusoids
Space between Endothelium of Sinusoids and Hepatocytes
Space of Disse (Peri-Sinusoidal Space)
Exchange of metabolite and nutritive substance between liver and blood
Has Stellate cells
Stellate cells present in
Space of Disse
PeriPortal space is called
Space of Mall
Portal Lobule has
Central vein in Periphery
Portal Vein in the Centre
Triangular in shape
Signifies the direction of bile flow (towards Portal Vein)
Zone of Hepatic Acinus Closed to Portal Canal
Zone l ~ Highly Vascular
What is Hepatic Acinus
Space between adjacent Hepatocytes supplied by Branches of Portal Vein and Hepatic Artery
Diamond Shaped
Has 3 Zones
Zone Prone to Hypoxic Injury
Zone lll
Shape of
Hepatic Lobule ~
Portal Lobule ~
Hepatic Acinus ~
Hepatic Lobule ~ Hexagonal
Portal Lobule ~ Triangular
Hepatic Acinus ~ Diamond