This study provides an introduction to the description of hadrons, mesons and baryons, within a quark model based on a chirally invariant quantum field theory. Emphasis is placed on a didactic approach intended for graduate students with some background on functional integral techniques. Starting from QCD a motivation of a specific form of the effective quark interaction is given. Functional integral bosonization leads to a theory describing successfully meson properties. Via functional integral techniques, a Faddeev equation for baryons describing them as bound states of a diquark and a quark is derived. Finally a unification of these two complementary pictures of baryons is proposed.

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