Accurate maple tree identification can sometimes be an issue if you are concerned about the health and care of your tree, but most maples normally are subject to similar pests and diseases, and most require similar care.
The lack of platelets and proteins to form a clot prevents the  clotting of blood. This can also happen if there are any bleeding  disorders that prevent clot formation.Edit.onfidence votes 210. There are many things people can do to prevent blood from clotting inside the blood vessels. One of those is making sure you don't sit/laydown very long.
The fibrinolytic system is activated in parallel with the coagulation system when a blood vessel is damaged. It helps restrain clot formation in blood vessels, thus helping to prevent clots from blocking blood vessels, and eventually dissolves the clot once a blood vessel wall has healed.