Multiple choice

Blood clot formed in vessels blocking flow of blood is called

  1. bolus

  2. pus

  3. ulcer

  4. thrombus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A thrombus is a blood clot that forms in a blood vessel and remains attached to its place of origin. It can block blood flow by physically obstructing the vessel lumen. A bolus refers to a rounded mass of food or liquid, pus is an accumulation of dead cells and bacteria from infection, and an ulcer is an open sore on tissue surface.

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