He studied the processes of digestion, respiration, and blood formation, the urinary system, urine and urinary calculi
he wanted to study only urea, the saccharine matter (carbohydrates), and lithic (uric) acid, because the other constituents of urine had an uncertain nature.
Personally, I think since all the changes in the world are affecting the natural environment adaptive traits are important so that they can help maximize its reproductive success so its species can survive.
