The first theoretical foundation of Islamic medication received regarding the Greek and Roman theory of humors, related to Hippocrates, composing into the 4th century B.C. The device of humors divides individual liquids into four fundamental kinds: blood, phlegm, yellow bile, and black colored bile. The total amount between every one determines whether a person is sick or well. Clients became depressed, for instance, due to a surfeit of black colored bile. Continua a leggere Greek science became the cornerstone for the development of Arabic medication.