Types of blood vessels, including an arteriole and artery, as well as capillaries.
Rabbit arteriole at 100X
Details
Pronunciation
/ɑːrˈtɪəri.oʊl/
Identifiers
Latin
arteriola
MeSH
D001160
TA98
A12.0.00.005
TA2
3900
FMA
63182
Anatomical terminology
[edit on Wikidata]
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 occurs at the transition of arterioles to capillaries. This function is extremely important because it prevents the thin, one-layer capillaries from exploding upon pressure. The arterioles achieve this decrease in pressure, as they are the site with the highest resistance (a large contributor to total peripheral resistance) which translates to a large decrease in the pressure.[2]
^Maton, Anthea; Jean Hopkins; Charles William McLaughlin; Susan Johnson; Maryanna Quon Warner; David LaHart; Jill D. Wright (1993). Human Biology and Health. Englewood Cliffs, New Jersey: Prentice Hall. ISBN 0-13-981176-1.
^Rahman, Masum; Abu Bakar, Siddik (4 December 2021). StatPearls [Internet] (Updated ed.). Treasure Island (FL): StatPearls Publishing. pp. 2–5. PMID 32310381. Retrieved 17 November 2022.
arteriole is a small-diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries. Arterioles have...
The afferent arterioles are a group of blood vessels that supply the nephrons in many excretory systems. They play an important role in the regulation...
The efferent arterioles are blood vessels that are part of the urinary tract of organisms. Efferent (from Latin ex + ferre) means "outgoing", in this case...
is the phenomenon where, on examination of the eye, a small artery (arteriole) is seen crossing a small vein (venule), which results in the compression...
peritubular capillaries are tiny blood vessels, supplied by the efferent arteriole, that travel alongside nephrons allowing reabsorption and secretion between...
the glomerulus. The rest passes into an efferent arteriole. The diameter of the efferent arteriole is smaller than that of the afferent, and this difference...
corresponding efferent arteriole arises and then exits the capsule near the point where the afferent arteriole enters. Distally, efferent arterioles branch out to...
of the width of the arteriole and Silver wire arterioles where the central light reflex occupies all of the width of the arteriole, and "arterio-venular...
kidney nephron, next to the glomerulus. It is found between afferent arteriole and the thick ascending limb of the loop of Henle (distal straight tubule)...
two effects: (1) it decreases resistance to blood flow in the afferent arterioles, which raises glomerular hydrostatic pressure and helps return the glomerular...
vasoconstriction of the afferent arteriole versus the lower blood pressure created by lesser vasoconstriction of the efferent arteriole.[citation needed] GFR is...
location of the glomerulus. At the vascular pole, the afferent arterioles and efferent arterioles enter and leave the glomerulus in the Bowman's capsule. The...
The arcuate arteries of the kidney, also known as arciform arteries, are vessels of the renal circulation. They are located at the border of the renal...
tissues. The microvessels include terminal arterioles, metarterioles, capillaries, and venules. Arterioles carry oxygenated blood to the capillaries,...
the sphincteric muscle surrounding a cutaneous arteriole. The central red dot is the dilated arteriole and the red "spider legs" are small capillaries...
afferent arteriole is modified based on the difference between the sensed concentration and a target concentration. Vasodilation of the afferent arteriole, which...
peripheral arteries into smaller arteries called arterioles, and eventually to capillaries. Arterioles help in regulating blood pressure by the variable...
corpuscle structure Blood flows in the afferent arteriole at the top, and out the efferent arteriole at the bottom. Blood flows through the capillaries...
input or afferent arteriole versus the lower blood pressure created by lesser vasoconstriction of the output or efferent arteriole. GFR is equal to the...
Diagram of the classic Starling model; the arteriole is shown in red on the left, and the venule in purple on the right. Note that the concentration of...
fluid, and they convey blood from the smallest branches of the arteries (arterioles) to those of the veins (venules). Other substances which cross capillaries...
artery supplies several interlobular arteries that feed into the afferent arterioles that supply the glomeruli. After filtration occurs, the blood moves through...
artery or pulmonary trunk from the heart, and the smallest ones are the arterioles, which lead to the capillaries that surround the pulmonary alveoli. The...
refers to the inherent attempt of vascular smooth muscle surrounding arterioles and arteries to maintain the tension in the wall of these blood vessels...
artery supplies several interlobular arteries that feed into the afferent arterioles that supply the glomeruli. Blood drains from the kidneys, ultimately into...
middle layer is poorly developed so that venules have thinner walls than arterioles. They are porous so that fluid and blood cells can move easily from the...
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