Given the great amount of data that are generated of the experiments that are made to analyze information of the extracted chemical fluids from the brain of a rodent, arises the necessity to design and to implement data mining systems to process this data. In this work is proposed a Fuzzy System for the Analysis of Biological Liquids (FSABL) that allows to analyze and to process the data, and this way, to know a series of disorders products of alterations, storage, and liberation of the Neurotransmitters. The FSABL is constructed under the paradigm of the Classifier Systems. Our system has been tested to determine the variation of the glutamate Neurotransmitter in the cerebral tonsil of the rats. It discovers and evaluates new rules, and it generates new solutions associated to clinical disorders.