Arterioles


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Arterioles

Small blood vessels that carry arterial (oxygenated) blood.
References in periodicals archive ?
Skin veins are also in a state of tone dependence on the sympathetic outflows.[11] Thus, it is possible that the dilation of the vein due to a reduction in the fiber tone contributes to an increase in blood volume, as in the arterioles. However, this sympathetic regulation dominates in arterioles more than in veins, because veins have less vascular smooth muscle than arteries.[5]
In terminal arterioles, vasomotion is postulated to be due to a local vascular pacemaker-like mechanism that can be influenced by the perfusion pressure [15].
The small blood vessels in between the arteries and capillaries, the arterioles, are able to dilate (become larger) or contract (become smaller) under the influence of certain nerve impulses.
In 1930, before cardiac catheterization, the study of PH was limited to autopsy cases that provided limited insight into the functional behavior of small pulmonary arteries and arterioles. Investigation of the functional aspect of pulmonary vasculature began in 1940, and assessment of pulmonary vascular hemodynamics by cardiac and pulmonary artery catheterization fundamentally changed the understanding of the pulmonary circulation.
The retinal oxygen levels of the optic disc area and macular region (the arterioles and the venules) were measured separately.
In zones B and C, retinal arterioles have been marked in red and venules in blue.
In order to identify the organization of the arterial network and to measure its density in arteries and arterioles, a second group composed of 2 injected heads with 10 % formalin solution and frozen at -22[degrees]C was used.
The primary veins were wider, darker, less in number and less tortuous than arterioles. The veins formed a venous circle in central part of disc.
In addition, we will study the signaling of EETs in isolated renal arterioles to determine the changes in EETs - mediated signal transduction in hypertension.
Moreover, renal auto-regulation occurs primarily in the preglomerular afferent arterioles, and it is modulated by various degrees of afferent and efferent arteriolar constriction.
Calciphylaxis is a rare and serious disorder of smaller arteries, arterioles and capillaries.
This leads to most examiners applying an almost binary approach to grading AVR by stating 2:3 in most cases, whereas in cases of vessels of the same size as 1:1 and retinal arterioles classed as generalised narrow, referred to as 1:2.