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Qu'est-ce (qui) est arteriole - définition

SMALLER BRANCHES OF ARTERIES IN THE CAPILLARIES

Arterioles; Arteriola

Arteriole

·noun A small artery.

arteriole

[?:'t??r???l]

¦ noun Anatomy a small branch of an artery leading into capillaries.

Derivatives

arteriolar adjective

Origin

C19: from Fr. arteriole, dimin. of artere (see artery).

Afferent arterioles

BLOOD VESSEL THAT SUPPLIES THE GLOMERULI OF THE KIDNEY

Afferent arteriole; Afferent vessel; Arteriola glomerularis afferens; Arteriola afferens; Afferent glomerular arteriole; Arteriola glomerularis afferens capsulae renalis

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 of blood pressure as a part of the tubuloglomerular feedback mechanism.

https://en.wikipedia.org/wiki/Afferent_arterioles

Wikipédia

Arteriole

An arteriole is a small-diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries.

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.

https://en.wikipedia.org/wiki/Arteriole