GWEN SHOCKEY / SCIENCE PHOTO LIBRARY GWEN SHOCKEY / SCIENCE PHOTO LIBRARY
Illustration comparing a normal artery (left) and one with a blood clot, or thrombus (middle). In the close up view at the far right, the thrombus has broken off and is now a detached, traveling mass called an embolus. If the embolus does not break down, it may cause blockage to arterial capillary beds as it moves with the blood flow.
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