Arteriole

usgb/ɑːrˈtɪriəʊl/
noun

A small artery that carries blood from larger arteries to tiny vessels in the body.

Arterioles play a key role in regulating blood pressure by narrowing or widening.
Visual representation of "arteriole" - A small artery that carries blood from larger arteries to tiny vessels in the body.

Often appears as...

  • arteriole constriction
  • arteriole dilation

Usage tips

Technical

Definition 1 of 1
Visual representation of "arteriole"
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Vessel Size

An arteriole is smaller than an artery but larger than a capillary; size is key.

Illustration for Vessel Size
The blood moved from the artery, through the arteriole, and into the capillaries.
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Blood Flow Control

Arterioles help regulate the flow and distribution of blood to different body areas.

Illustration for Blood Flow Control
When exercising, arterioles in muscles dilate to increase blood flow.
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Blood Pressure

By changing diameter, arterioles play a critical role in controlling blood pressure.

Illustration for Blood Pressure
High arteriole resistance can contribute to hypertension.
Visual representation of the word "Arteriole"

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