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  2. 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.

  3. Intracranial aneurysm - Wikipedia

    en.wikipedia.org/wiki/Intracranial_aneurysm

    However, smooth muscle cells from the tunica media layer of the artery moved into the tunica intima, where the function of the smooth muscle cells changed from contractile function into pro-inflammatory function. This causes the fibrosis of the arterial wall, with reduction of number of smooth muscle cells, abnormal collagen synthesis ...

  4. Endothelium - Wikipedia

    en.wikipedia.org/wiki/Endothelium

    The endothelium (pl.: endothelia) is a single layer of squamous endothelial cells that line the interior surface of blood vessels and lymphatic vessels. [1] The endothelium forms an interface between circulating blood or lymph in the lumen and the rest of the vessel wall.

  5. 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.

  6. Capillary - Wikipedia

    en.wikipedia.org/wiki/Capillary

    They are composed of only the tunica intima (the innermost layer of an artery or vein), consisting of a thin wall of simple squamous endothelial cells. [2] They are the site of the exchange of many substances from the surrounding interstitial fluid , and they convey blood from the smallest branches of the arteries ( arterioles ) to those of the ...

  7. 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.

  8. Carotid artery dissection - Wikipedia

    en.wikipedia.org/wiki/Carotid_artery_dissection

    Arterial dissection of the carotid arteries is a condition that arises when a small tear forms in the innermost lining of the arterial wall, known as the tunica intima. This tear allows blood to enter the space between the inner and outer layers of the vessel, leading to either narrowing or complete occlusion. Notably, the stenosis in the early ...

  9. Atheroma - Wikipedia

    en.wikipedia.org/wiki/Atheroma

    The healthy epicardial coronary artery consists of three layers, the tunica intima, media, and adventitia. [ 10 ] [ 11 ] Atheroma and changes in the artery wall usually result in small aneurysms (enlargements) just large enough to compensate for the extra wall thickness with no change in the lumen diameter.