Blood Vessels

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Blood Vessels
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• Normal
• Arteries
• Media has Elastic lamina on either side
• Adventitia has Vasa Vasorum
• Walls dont not collapse even after death (Like
  Tubes)
• Smooth Muscle Cells (SMC) in media important in
  Vasoconstriction and Vasodilatation
• Vaso- pressers Vasodilators( Anti- HTN drugs)
  act here.
• Migrate proliferate in Intima Atherosclerosis
  (AS)
• Veins
• No Elastic lamina
• No Adventitia has Vasa Vasorum
• Walls collapse (no elastic support)
• No Smooth Muscle Cells ( SMC)
• Lymphatics
• Like tubes of endothelium

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Artery
SMC
Vasa Vasorum
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Arteries Veins

• Arteries- lumina are circular, not collapsed
• Veins-Tortuous, collapsed

v
A
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• Pathology
• Arteries
• Most commonly involved
• Most common causes of Morbidity Mortality
• Disorders
• 1. narrowing
• partial slow onset AS
• complete Sudden obstruction Thrombus/Embolus
• Veins
• Less commonly involved
• Disorders
• Varicosities
• Thrombosis ( Thrombophlebitis )
• Lymphatics
• Inflammatory disorders Lymphangitis
• Edema Lymphedema

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