arterial wall

arterial wall

the fibrous and muscular wall of vessels that carry oxygenated blood from the heart to structures throughout the body, and of the pulmonary arteries that carry deoxygenated blood from the heart to the lungs. The wall of an artery has three layers: the tunica intima, the inner coat; the tunica media, the middle coat; and the tunica adventitia, the outer coat. Nerves from the sympathetic system constrict the vessel and thus control the flow of blood into the areas served by the artery. The middle layer in smaller arteries is almost entirely muscular and in larger arteries is more elastic. The thickness of the outer layer varies with the location of the artery. In protected areas, such as the abdominal and cranial cavities, the outer layer of associated arteries is very thin, but in more exposed locations, as in the limbs, it is much thicker.
References in periodicals archive ?
Arteries may be regarded as fibre-reinforced materials, with the stiffer collagen fibres present in the arterial wall bearing most of the load during pressurisation.
A recent study published in Thrombosis and Haemostasis found that supplementation with vitamin K2 in the form of MK-7 (menaquinone-7) can help reduce the risk of age-related arterial wall stiffness in middle-aged women.
From uniaxial tests of arterial wall, we can see that arterial wall has the phenomenon of non-linear stress strain relation and having higher extensibility in the low stress and progressively lower with increasing stretch, which is well known also in the framework of rubber-like materials [4].
According to the wall strain-stiffening phenomenon, high stress sites correspond to stiffer sites in the arterial wall.
Laughter reduces arterial wall stiffness, which researchers suggest may relieve tension.
Coronary artery dissection results from separation of the layers of the arterial wall creating a false lumen between the intima and media or media and adventitia.
Arteries Insulin can narrow the arteries by stimulating the growth of muscle fibres in the arterial wall.
Sildenafil, most commonly known as Viagra, is also used to treat pulmonary arterial hypertension by relaxing the arterial wall, meaning the workload of the right ventricle is reduced.
Topics include transport/reaction processes in biology and medicine, microvascular heat transfer, animal surrogate systems, arterial wall mass transport, transport phenomena and the microenvironment, and transport and drug delivery through the blood-brain barrier and cerebrospinal fluid.
Previous studies have shown an association between environmental tobacco smoke (ETS) exposure in adults and cardiovascular disease (CVD) and an increase of the thickening of the arterial wall and lipid alterations associated with atherosclerosis.
Therefore, while normal cholesterol levels in the arterial wall are critical for ethanol-induced cerebral vasoconstriction, arterial wall cholesterol enrichment does not drastically modify ethanol-induced vasoconstriction.
The third and outermost portion of the arterial wall is called the adventitia.