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Digistestive system
N/A
5
Histology
Undergraduate 1
12/14/2010

Additional Histology Flashcards

 


 

Cards

Term
4 Principal Coats
Definition
MSMS
1- Mucosa
2- Sub Mucosa
3- Mucularis Externa
4- Serosa (Adventitia)
Term
Mucosa
Definition
1- Epithelium 2- Lamina Propria 3- Muscularis Mucosa

Epithelium : Stratified Squamous in the beginning, then Simple Columnar Epithelium

Lamina Propria : C.T = Fibers (Elastic and Reticular) + Cells (Plasma cells, mast cells, histiocytes and lymphocytes) + Ground substance + blood capillaries + lymph capillaries + Mucosal glands
Term
SubMucosa
Definition
Loose Areolar Tissue, Plexuses of Nerves (Meissner), lymph and capillaries, Lymphoid tissues and Glands (in esophagus and duodenum)
Term
Muscularis Externa
Definition
Skeletal Muscle in the upper osophagus and anal spincter
Smooth muscle in the remaining part.
Consisting of:
1- Outer Longitudinal Muscles = Open Helix = Widens lumen and shortens the length of osophagus
2- Inner Smooth Muscle = tight helix = Constricts lumen

O for Outer coat, O for open helix.

Auerbach's plexus (Myenteric plexus) present between the two layers.
Term
Adventitia
Serosa
Definition
Adventitia AKA FIBROSA = Connective Tissue consisting of blood vessels, lymph vessels and elastic fibers

In peritoneum, adventitia is lined by SIMPLE SQUAMOUS EPITHELIUM, now it is called SEROSA
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