Tissue
tunica media
tu·ni·ca me·di·a
Subclass of:
Blood Vessel
Definitions related to tunica media:
  • The middle layer of blood vessel walls, composed principally of thin, cylindrical, smooth muscle cells and elastic tissue. It accounts for the bulk of the wall of most arteries. The smooth muscle cells are arranged in circular layers around the vessel, and the thickness of the coat varies with the size of the vessel.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • The middle layer of the blood vessel wall. It consists of concentrically arranged smooth muscle and may include elastic tissue. Its thickness will depend on the type of vessel, thicker in arteries than in veins.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
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