The coronary arteries because they supply fresh blood to the heart's own muscle.
The heart stops pumping if its muscle wall doesn't get enough blood. The coronary arteries are what supply blood to the heart itself and they are pretty small and narrow- they can't handle even a small clot.
Every bruise results in minor bleeding and a small blood clot. A blood clot is the body's natural way to stop bleeding and heal the site. If you mean cause a dangerous clot, a bruise is not in a vein. It is more a superficial injury. The only way a clot is dangerous is if it can travel to the heart or brain. Bruises don't cause clots that will travel.
Yes, injecting a blood clot can be extremely dangerous. Blood clots can block blood vessels, leading to severe complications such as stroke, heart attack, or pulmonary embolism, depending on where the clot travels. Introducing a clot into the bloodstream can disrupt normal circulation and cause life-threatening conditions. It is crucial to seek medical help immediately if there is any concern about blood clots.
thrombosis
Veins carry blood to the heart, therfore in all likelyhood that clot is on it's way to the heart and will likely cause a myocardial infarction (heart attack).
A Circulating clot is referred to as an embolism.
"A stroke" is the answer you're looking for.
blood clot lodging in a blood vessel supplying the heart
A clot
A blood clot in your cheek is life threatening and you would have to have surgery for the clot to be removed.
A thrombus is a clot that forms inside a vessel or the heart.
A thrombosis has the potential of having a blood clot, and that is dangerous if it gets dislodged and travels into an organ like the heart, lungs, or brain.
If blood wouldn't clot then when someone got a cut his blood would never stop leaking from it. Now that the blood does clot the hole will be filled up and the blood would stop.