Total Bilirubin (T.Billi) is the sum of conjugated and unconjugated serum bilirubin. One of the byproducts of red blood cell breakdown is bilirubin. Bilirubin is made in the bone marrow, liver, or spleen and is transported by albumin to the liver in the form of unconjugated bilirubin. Once in the liver, sugars bind to the unconjugated bilirubin, turning it to conjugated bilirubin. It is then excreted from the gall bladder into the small intestine. Eventually, it is excreted in the feces or urine. Excess bilirubin causes a yellowing of the skin and the whites of the eyes called jaundice.
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