Medical Definition of angiosperm. : any of a class (Angiospermae) of vascular plants (as orchids or roses) that have the seeds in a closed ovary and include the monocotyledons and dicotyledonsâcompare gymnosperm.
Bilirubin (formerly referred to as haematoidin) is the yellow breakdown product of normal heme catabolism, caused by the body's clearance of aged red blood cells which contain hemoglobin. Bilirubin is excreted in bile and urine, and elevated levels may indicate certain diseases.
If not, the bilirubin circulates the body via red blood cells instead. The bilirubin is excreted as a component of bile, and gives rise to the color of urine and feces through further processing in the small intestine to a component called urobilinogen.he bilirubin is excreted as a component of bile, and gives rise to the color of urine and feces through further processing in the small intestine to a component called urobilinogen.