An embolus is an unanchored mass that travels through the blood vessels. This mass can consist of a variety of different materials, though blood clots are the most common. Eventually, the embolus reaches a blood vessel too narrow for it to travel through, and lodges there. This prevents blood from travelling through and prevents the area from receiving oxygenated blood and reoxygenation of the blood. This blockage is an embolism.
There are several types of emboli, each with a unique cause and made up of different materials:
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