Can blood clots be helpful

Answer 1

The basic answer is yes, but that requires clarification. Blood clots form when blood vessels are broken or damaged and the blood leaves the circulatory system, either into the rest of the body (internal bleeding) or outside of the body (external bleeding). Blood begins clotting by producing several products that constrict blood flow and begin to repair the damage - in this case, blood clots are extremely useful as they prevent excess blood loss. In some cases, the blood cannot clot enough to stop bleeding and stiches are required to keep the breakage shut long enough for the body to repair the damage. However, blood clots loose in the circulatory system can be very damaging. If a blood clot were to form somewhere in the body, dislodge and travel to the brain via the aorta, it can block blood flow to the brain and cause a stroke. Blood clots in the legs, otherwise known as deep vein thrombosis, can be very painful and cause reddness, irritaition and swelling. MedicineNet(http://www.medicinenet.com/blood_clots/article.htm) has a good article on blood clots for more information.