Definition of Arteriole

Arteriole: A small branch of an artery that leads to a capillary. The oxygenated hemoglobin (oxyhemoglobin) makes the blood in arterioles (and arteries) look bright red.


Last Editorial Review: 3/19/2012

Heart Disease Pictures Slideshow: A Visual Guide to Heart Disease
Search MedTerms:


Back to MedTerms online medical dictionary A-Z List
Pill Identifier Tool

Need help identifying pills and medications?
Use the pill finder tool on RxList.