Question: What are thrombi? Eva (Toledo).
Answer: The thrombus is a blood clot that forms in a blood vessel and stays there. Embolism is a clot that travels from where it formed to another place in the body. The thrombus or embolism can occur in a vessel and obstruct blood flow there, preventing the supply of oxygen and blood flow to the surrounding tissues. This can cause damage, destruction (heart attack) and even death or necrosis of the tissues found in that area.