Final answer:
Normal levels of bilirubin, urea, and ammonia indicate normal liver and kidney function.
Step-by-step explanation:
The fact that the free bilirubin, urea, and ammonia levels were all normal indicates that there were no abnormalities in the liver function and kidney function. Bilirubin is a byproduct of red blood cell breakdown and is metabolized by the liver. Urea is a waste product of protein metabolism and is excreted by the kidneys. Ammonia is produced during the breakdown of proteins and is also eliminated by the kidneys. Normal levels of these substances suggest that the liver and kidneys are functioning properly and are able to eliminate waste products.