Red blood cell blood circulation for about 100 to 120 days (and 80 to 90 days in a full term infant). At the end of their lifespan, they are removed from circulation. In many chronic diseases, the lifespan of the red blood cells is reduced. Erythropoiesis is the process by which new red blood cells are produced; it lasts about 7 days. Through this process red blood cells are continuously produced in the red bone marrow of large bones. (In the embryo, the liver is the main site of red blood cell production.) The production can be stimulated by the hormone erythropoietin (EPO),
The Blood Cell characterisation perfectly". The audio addition to the book was released on 13 November 2014, read by Colin McFarlane who played General Austin Pierce in "" and guest starred in the "Doctor Who" episodes "Under the Lake" and "Before the Flood" as Moran. This was the first new series audio to be released since AudioGo went into administration in 2013. The Blood Cell The Blood Cell is a BBC Books original novel written by James Goss and based on the long-running British science fiction television series "Doctor Who". It features the Twelfth Doctor and Clara Oswald. The book was released on