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 Towers version by the full band, which was previously released as a single in 2005. It is one of only six UK top 50 singles to have the word "fuck" in the title. "Blood, Sweat and Towers" was released on three different dates, depending on location; Blood, Sweat and Towers Blood, Sweat and Towers is the debut album of English punk rock band the Towers of London, released on 5 June 2006. The album features thirteen tracks, four of which have been released in the United Kingdom as singles. The album was heavily influenced by Sex Pistols' "Never Mind the Bollocks"