A pulmonary embolus (blood clot to the lung) is usually a small clot that forms somewhere else in the body (usually the legs) and travels through the blood stream until it blocks a major blood supply to the lungs. This prevents normal oxygen exchange and can result in death if not taken care of immediately. I've reference the Medline page if you need more information, especially regarding treatment.
if you are asking what blood cells help blood clot up to keep your cut from bleeding out, they're platelets. :)
platelets
Fibrin
Help the blood clot.
Platelet cells are the component within blood cells that help control bleeding by helping blood to clot.
Blood platelets help blood clot.
red blood cells
White blood cells help clot the blood. Low PH makes red blood cells clump together
formation of a clot
to help blood clot
to help blood clot
Yes.