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.
[edit on Wikidata] Thrombosis (Greek: Î¸ÏÏÎ¼Î²ÏÏÎ¹Ï) is the formation of a blood clot (thrombus; Greek: Î¸ÏÏÎ¼Î²Î¿Ï) inside a blood vessel, obstructing the flow of blood through the circulatory system. When a blood vessel is injured, the body uses platelets (thrombocytes) and fibrin to form a blood clot to prevent blood loss.