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  2. Elastic artery - Wikipedia

    en.wikipedia.org/wiki/Elastic_artery

    An elastic artery (conducting artery or conduit artery) is an artery with many collagen and elastin filaments in the tunica media, which gives it the ability to stretch in response to each pulse. [1] This elasticity also gives rise to the Windkessel effect , which helps to maintain a relatively constant pressure in the arteries despite the ...

  3. Artery - Wikipedia

    en.wikipedia.org/wiki/Artery

    Systemic arteries can be subdivided into two types—muscular and elastic—according to the relative compositions of elastic and muscle tissue in their tunica media as well as their size and the makeup of the internal and external elastic lamina. The larger arteries (>10 mm diameter) are generally elastic and the smaller ones (0.1–10 mm ...

  4. Tunica intima - Wikipedia

    en.wikipedia.org/wiki/Tunica_intima

    The tunica intima (Neo-Latin "inner coat"), or intima for short, is the innermost tunica (layer) of an artery or vein. It is made up of one layer of endothelial cells (and macrophages in areas of disturbed blood flow), [1] [2] and is supported by an internal elastic lamina. The endothelial cells are in direct contact with the blood flow.

  5. Tunica media - Wikipedia

    en.wikipedia.org/wiki/Tunica_media

    In the larger arteries, as the iliac, femoral, and carotid, elastic fibers and collagen [3] unite to form lamellae which alternate with the layers of smooth muscular fibers; these lamellae are united to one another by elastic fibers which pass between the smooth muscular bundles, and are connected with the fenestrated membrane of the inner coat.

  6. Internal elastic lamina - Wikipedia

    en.wikipedia.org/wiki/Internal_elastic_lamina

    Micrograph showing the internal elastic lamina (thin pink wavy line - image edge mid-left to image edge bottom-centre-left). H&E stain. The internal elastic lamina or internal elastic lamella is a layer of elastic tissue that forms the outermost part of the tunica intima of blood vessels. It separates tunica intima from tunica media.

  7. Blood vessel - Wikipedia

    en.wikipedia.org/wiki/Blood_vessel

    The tunica media may (especially in arteries) be rich in vascular smooth muscle, which controls the caliber of the vessel. Veins do not have the external elastic lamina, but only an internal one. The tunica media is thicker in the arteries rather than the veins. The outer layer is the tunica adventitia and the thickest layer in veins. It is ...

  8. Vasa vasorum - Wikipedia

    en.wikipedia.org/wiki/Vasa_vasorum

    The structure of the vasa vasorum varies with the size, function and location of the vessels. Cells need to be within a few cell-widths of a capillary to stay alive. In the largest vessels, the vasa vasorum penetrates the outer (tunica adventitia) layer and middle (tunica media) layer almost to the inner (tunica intima) layer.

  9. Tunica externa - Wikipedia

    en.wikipedia.org/wiki/Tunica_externa

    The tunica externa is made from collagen and elastic fibers in a loose connective tissue. [1] [2] This is secreted by fibroblasts. [1]This is normally the thickest tunic in veins and may be thicker than the tunica media in some larger arteries.

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