arteriole


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to arteriole: arteriosclerosis

arteriole

 [ahr-te´re-ōl]
a minute arterial branch. adj., adj arterio´lar.

ar·te·ri·ole

(ar-tēr'ē-ōl), [TA]
A minute artery with a tunica media comprising only one or two layers of smooth muscle cells; a terminal artery continuous with the capillary network.
Synonym(s): arteriola [TA]

arteriole

/ar·te·ri·ole/ (ahr-tēr´e-ōl) a minute arterial branch.arterio´lar
afferent glomerular arteriole  a branch of an interlobular artery that goes to a renal glomerulus.
efferent glomerular arteriole  one arising from a renal glomerulus, breaking up into capillaries to supply renal tubules.
postglomerular arteriole  efferent glomerular a.
precapillary arteriole  arterial capillary.
preglomerular arteriole  afferent glomerular a.
straight arterioles of kidney  branches of the arcuate arteries of the kidney arising from the efferent glomerular arterioles and passing down to the renal pyramids.

arteriole

(är-tîr′ē-ōl′)
n.
One of the small terminal branches of an artery, especially one that connects with a capillary.

ar·te′ri·o′lar (-ō′lər, -ə-lər) adj.

arteriole

[ärtir′ē·ōl]
Etymology: L, arteriola, little artery
the smallest of the arteries. Blood flowing from the heart is pumped through the arteries, to the arterioles, to the capillaries, into the veins, and returned to the heart. The muscular walls of the arterioles constrict and dilate in response to both local factors and neurochemical stimuli; thus, arterioles play a significant role in peripheral vascular resistance and in regulation of blood pressure. Also called arteriola. See also artery. arteriolar, adj.

arteriole

Anatomy A teeny weeny artery that connects arteries with capillaries

ar·te·ri·ole

(ahr-tēr'ē-ōl) [TA]
A minute artery with a tunica media comprising only one or two layers of smooth muscle cells; a terminal artery continuous with the capillary network.
Synonym(s): arteriola [TA] .

arteriole

A small terminal branch of an artery, intermediate in size between an artery and a CAPILLARY.
Arterioleclick for a larger image
Fig. 48 Arteriole . Arterioles, capillaries and venules.

arteriole

any of the narrow, thin-walled arteries that carry oxygenated blood to the tissues from the heart, forming part of the BLOOD CIRCULATORY SYSTEM. Arterioles progressively get smaller as they approach the target tissue, giving offside branches which become capillaries. Some arterioles connect up directly to VENULES via SHUNT VESSELS, particularly in tissues with a constant blood supply such as the skin.

Arteriole

The smallest type of artery.
Mentioned in: Raynaud's Disease

arteriole

minute, muscular-walled artery that communicates with the capillary network; acts as a resistance vessel; see resistance vessels

ar·te·ri·ole

(ahr-tēr'ē-ōl) [TA]
A minute artery with a tunica media comprising only one or two layers of smooth muscle cells; a terminal artery continuous with the capillary network.

arteriole (ärtir´ēōl),

n a smaller arterial branch off an artery and connecting to a capillary.

arteriole

a minute arterial branch.

afferent arteriole
enters the glomerulus at the vascular pole and divides into capillaries which subsequently merge to form efferent arterioles.
efferent arteriole
derived from the glomerular capillaries in the renal glomeruli, these arterioles exit from the glomerulus at its vascular pole.
straight arteriole
see arteriola rectae renis.
References in periodicals archive ?
Originally, it was thought appropriate to quantify generalised arteriolar attenuation due to evidence that arterioles would be more affected by narrowing in response to cardiovascular disease processes than venules.
This massive organ is supplied with blood by the hepatic artery, which is subdivided into many terminal hepatic arterioles that are interspersed between and among the digestive tubules.
15,16) Hyalinotic lesions in the glomeruli and arterioles also stain with IgM and C1q.
Acute hypertension can enter an exaggerated or malignant stage characterised by fibrinoid necrosis of the arterioles and papilloedema (Figure 2).
With its pattern of shapes and colors, the photo is a powerful contrast to another image that Pottle uses in his work as a teacher of microscopy technique to researchers -- an image that depicts an arteriole in an eye suffering from disease.
Uncomplicated vascular immune complex deposits consist of a deposition of immunoglobulins and complement primarily in afferent arterioles.
The findings also showed that vessel impairments did not require lung exposures: In these experiments, ingested nanotubes produced the most dramatic change in arteriole reactivity.
The lesions caused by the subtype H5N1 strain were distinguishable by the late and mild regressive alterations of the airway epithelium, the extent of alveolar edema, the low cell density of the inflammatory infiltrates, the high number of alveolar hemorrhage foci, and the unusual appearance of the pulmonary arterioles (which seemed to have been dissected from the surrounding tissues because of the magnitude of the perivascular edema).
They are the conection between arterioles (the smallest artery) and venules (the smallest vein) and, thus, between the arterial land venous sides of the circulatory system.
Key words: arteriole, endothelium, microcirculation, myeloperoxidase, oxidative stress, particulate matter, polymorphonuclear leukocyte, systemic, venule.
The latter is associated not just with hypertensive retinopathy, but is often a feature of retinal arteriole macroaneurysm, and is often associated with retinal vein occlusions.