Final answer:
Among the provided options, Cholesterol is considered a nonpathological crystal, as it can be found in normal, healthy individuals. Unlike bilirubin and hemosiderin, which are byproducts of hemoglobin breakdown and can be associated with disease states, cholesterol is not typically indicative of disease when found in bodily fluids.
Step-by-step explanation:
The crystal considered nonpathological among the options provided is Cholesterol. While crystals such as hemosiderin and bilirubin can indicate disease states, cholesterol crystals can be found in normal, healthy individuals. Bilirubin is a waste product formed from the breakdown of red blood cells and is processed by the liver, eventually being excreted in bile and transformed by bacteria in the intestines into stercobilin, which colors the stool brown. In certain conditions, excessive bilirubin can lead to jaundice, where the skin and eyes turn yellow. Hemosiderin is another byproduct of hemoglobin breakdown and can indicate hemorrhaging or iron-storage disorders when present in excess. Ammonium biurate crystals generally indicate a liver disorder or are found in the urine of individuals with certain metabolic diseases. Therefore, in a comparative context, cholesterol crystals are considered nonpathogenic and less indicative of disease.