Arterial Wall


The three layers of a typical arterial wall are shown in this medium-power view.  The center of the vessel is called the lumen.  From inside out, the first layer is the tunica interna, or intima (labeled 'I').  The media, the thickest layer of an artery, is labeled 'M,' and is made up mostly of smooth muscle fibers.  The outermost layer ('E') is the tunica externa, also called the adventitia.  

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Dr. Sullivan's Departmental Page

Copyright 2001 Dennis Sullivan, MD - All RIGHTS RESERVED

Cedarville University, 251 N. Main Street, Cedarville, OH 45314, USA  1-800-CEDARVILLE

Last updated: July 10, 2001.