<prompt> Percentage of bilirubin production from old RBCs208010040  <response>: B 80 Bilirubin is the end product of heme degradation. From 70 to 90 of bilirubin is derived from degradation of the hemoglobin of senescent red blood cells. Bilirubin produced in the periphery is transported to the liver within the plasma, where, due to its insolubility in aqueous solutions, it is tightly bound to albumin. 