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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.
Initial symptoms include hepatic, neurologic, or psychiatric disorders and, rarely, kidney, skeletal, or endocrine symptomatology. The disease progresses with deepening jaundice and the development of encephalopathy , severe clotting abnormalities, occasionally associated with intravascular coagulation , and advanced chronic kidney disease .
Angiotensin I is then converted to an octapeptide, angiotensin II by angiotensin-converting enzyme (ACE), [9] which is thought to be found mainly in endothelial cells of the capillaries throughout the body, within the lungs and the epithelial cells of the kidneys. One study in 1992 found ACE in all blood vessel endothelial cells. [10]
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Endothelial dysfunction may be involved in the development of atherosclerosis [5] [6] [7] and may predate vascular pathology. [5] [8] Endothelial dysfunction may also lead to increased adherence of monocytes and macrophages, as well as promoting infiltration of low-density lipoprotein (LDL) in the vessel wall. [9]
Chronic thromboembolic pulmonary hypertension (CTEPH) is a long-term disease caused by a blockage in the blood vessels that deliver blood from the heart to the lungs (the pulmonary arterial tree). These blockages cause increased resistance to flow in the pulmonary arterial tree which in turn leads to rise in pressure in these arteries ...
Within the cardiovascular system such as lining capillaries or the inside of the heart, simple squamous epithelium is specifically called the endothelium. [3] Cells are flat with flattened and oblong nuclei. It is also called pavement epithelium due to its tile-like appearance. This epithelium is associated with filtration and diffusion.
Fibrinoid necrosis is a pathological lesion that affects blood vessels, and is characterized by the occurrence of endothelial damage, followed by leakage of plasma proteins, including fibrinogen, from the vessel lumen; these proteins infiltrate and deposit within the vessel walls, where fibrin polymerization subsequently ensues.