Blood blood clotting in a transparent container. When blood is drawn in a glass container and left undisturbed for about an hour, four different layers can be seen. A dark clot forms at the bottom (the "black bile"). Above the clot is a layer of red blood cells (the "blood"). Above this is a whitish layer of white blood cells (the "phlegm"). The top layer is clear yellow serum (the "yellow bile"). The ABO blood group system was discovered in the year 1900 by Karl Landsteiner. Jan Janský is credited with the first classification of blood into the four types (A,
Blood Sweat and Wars Features the talents of Val Brodrick on tin whistle and uilleann pipes and Steve Gormley on Bodrahn & Backing Vocals. Produced by Andy Bridger and Stephen Burns. The song speaks from the perspective of a world-weary Traveling man and portrays a somewhat uncompromising and stark vista, whilst being intended as a social commentary and highlighting some of the issues faced by this section of society, it also poses questions of social inclusion, acceptance and equality. Blood Sweat and Wars Blood, Sweat and Wars is an upcoming Irish film written, produced and directed by Stephen Patrick Kenny and based on events