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.
Aspirin helps to prevent blood clots forming. A blood clot may form in a blood vessel (artery) if a lot of platelets stick on to some atheroma (see below). A clot in an artery may stop blood flowing to the tissues further down.