During childhood, almost every human bone produces red blood cells; as adults, red blood cell production is limited to the larger bones: the bodies of the vertebrae, the breastbone (sternum), the ribcage, the pelvic bones, and the bones of the upper arms and legs.
RJ (rapper) Rodney J. Brown Jr., better known by his stage name RJ, is a rapper from Los Angeles, California. A majority of his popularity stems from his frequent collaborations with both YG and DJ Mustard.
RJ11, RJ14, and RJ25 can be plugged into the same six-pin 6P6C jack, pictured. A Registered Jack (RJ) is a standardized telecommunication network interface for connecting voice and data equipment to a service provided by a local exchange carrier or long distance carrier.