Dr. Siyaves Azeri siyavesazeri@gmail.com Conceptual Cognitive Organs: Toward an Historical Theory of Scientific Knowledge Scientific concepts and conceptual systems (theories) appear to be a particular form of higher mental activity. They are cognitive tools that provide the ability of systematic cognition of phenomena, which are not available to the grasp of ordinary sense organs. They are tools of scientific “groping” of phenomena. Scientific concepts free perceptual and cognitive activity from determination of ordinary sense organs by providing a high degree of cognitive abstraction and generalization. Scientific cognition, like perceptual activity, is actualized by consciousness but outside the consciousness. Keywords: Concept, cognition, activity, consciousness, science, theory, reality, empiricism