What is Bilirubin?
'''Bilirubin''' is a product that comes from the breakdown of [[hemoglobin|haemoglobin]]. Its levels are higher in certain diseases and it causes the yellow color of [[bruise]]s and the brown color of [[feces|faeces]]. Its level usually measured to monitor [[liver]] or [[gallbladder]] problems. [[File:Heme b.svg|thumb|heme b]] [[File:Bilirubin.svg|300px|thumb|Bilirrubin: observe the N-rings]] [[Category:Iron compounds]] [[Category:Physiology]] [[Category:Organic compounds]] {{biology-stub}}