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 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 that occurred in and around Galway city and County from 1987 to 2009. The film is about the Longs and the Burkes, two families who are Galway’s biggest drug suppliers and involved in a deadly feud stemming from attempting to run organized crime in Galway. The film portrays the underground crime scene, bare-knuckle fighting, and young boys being sold as escort slaves. Written and performed by Stephen Burns, the song "Blood Sweat and Wars" also