The purpose of this blood serum test is to help detect and evaluate treatment of acute hepatic disease, especially hepatitis, and cirrhosis without jaundice. To help distinguish between mytyocardial (heart) and liver tissue damage (used with the AST enzyme test). Also to assess hepatotoxicity of some drugs.
The average wingspan for an NBA player (even normal 6'0 guys) is +4 inches. I think that around your height thing is just an estimate. For the general population, the average might be +2 inches.
The wandering albatross (Diomedea exulans) has the largest wingspan of any living bird. As a result, it is an expert glider and it is capable of remaining in the air without beating its wings for several hours at a time. The largest known specimen was an extremely old male with and 11 ft. 11 in. wingspan.