Histology Of Medium-Sized Arteries: Layers, Fibers, And Functions Explained

Histology Of Medium-Sized Arteries: Layers, Fibers, And Functions Explained

Histology of Medium Sized Artery
Answer:

• The blood vessels that take blood from heart to various tissues are called arteries
• The wall of medium sized artery is made up of:
  1. Tunica intima
     • It is innermost layer
     • Fibres in this layer runs longitudinally
     • Histology of medium sized artery It consists of:
       1. An endothelial lining
          • It is smooth lining which is sensitive to alterations in blood pressure
       2. Basal lamina
          • It is thin layer of glycoprotein lining external portion of endothelium
       3. Delicate layer of endothelial connective tissue
          Internal elastic lamina
       4. It is a membrane formed by elastic fibres
  2. Tunica media
     • It is middle layer
     • It consists of elastic tissue or smooth muscle
     • It may also contain some connective tissue
     • Fibres in this layer are circularly arranged
     • On outside of this layer, a membrane is formed of elastic fibres called external elastic lamina
  3. Tunica adventitia
     • It is outermost layer
     • It consists of connective tissue with predominate collagen fibres
     • These fibres are arranged longitudinally
     • This layer prevents undue stretching or distension of artery