GWEN SHOCKEY / SCIENCE PHOTO LIBRARY GWEN SHOCKEY / SCIENCE PHOTO LIBRARY
Illustration of a normal leg artery and ones with blood clots (arterial thrombosis and embolus). An embolus is any detached, traveling intravascular mass carried by circulation, which is capable of clogging arterial capillary beds. Arterial thrombosis is the formation of a thrombus within an artery.
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