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An arteriole is a small-diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries. [1] Arterioles have muscular walls (usually only one to two layers of smooth muscle cells) and are the primary site of vascular resistance. The greatest change in blood pressure and velocity of blood flow ...
Also arterial hyalinosis and arteriolar hyalinosis refers to thickening of the walls of arterioles by the deposits that appear as homogeneous pink hyaline material in routine staining. [3] It is a type of arteriolosclerosis, which refers to thickening of the arteriolar wall and is part of the aging process. [4] Associations
In general, arteries and arterioles transport oxygenated blood from the lungs to the body and its organs, and veins and venules transport deoxygenated blood from the body to the lungs. Blood vessels also circulate blood throughout the circulatory system. Oxygen (bound to hemoglobin in red blood cells) is the most critical nutrient carried by ...
Afferent arterioles, also known as arteriola glomerularis afferens Efferent arteriole , also known as arteriola glomerularis efferens Topics referred to by the same term
The systemic circulation is a circuit loop that delivers oxygenated blood from the left heart to the rest of the body, and returns deoxygenated blood back to the right heart via large veins known as the venae cavae. The systemic circulation can also be defined as two parts – a macrocirculation and a microcirculation.
Improper vasoconstriction may also play a role in secondary hypertension. [citation needed] To summarize, vasoconstriction is a physiological process that involves the narrowing of blood vessels, particularly arteries and arterioles, resulting in a reduction of blood flow to specific tissues or organs.
Vasodilation, also known as vasorelaxation, is the widening of blood vessels. [1] It results from relaxation of smooth muscle cells within the vessel walls, in particular in the large veins, large arteries, and smaller arterioles. [2]
Note 2: Also called the cortical radiate arteries. The interlobular artery also supplies to the stellate veins. Note 3: The efferent arterioles do not directly drain into the interlobular vein, but rather they go to the peritubular capillaries first. The efferent arterioles of the juxtamedullary nephron drain into the vasa recta.