[Gravitational mechanisms of interactions of sensory systems in invertebrates in the evolutionary aspect].
The paper concerns the origin and the interaction of sensory organs in the context of locomotion. The Earth's gravity, light, sound, electrical, mechanical, etc. impacts were the morphogenetic factors of evolution which pushed the gene to elaborate adequate mechanisms for surmounting gravity, i.e. for exercising directed locomotion. Indeed, even some species of bacteria have mobile levers, flagelli. As a rule, the flagellum itself is the carrier of protein sensory molecules perceiving gravity as a mechanic stress, light, chemical ligands, sound, electricity, etc. On the molecular, subcellular, cellular, and organic levels in unicells and most ancient multicellular organisms an attempt has been made to follow the evolution of locomotion substrate and sensory organs and nerve centers interacting with the substrate and each other and, taken together, recognized as the locomotor-sensory system (LMSS).