.The Organ of Corti is enclosed in the cochlea which is deeply imbedded in the temporal bone (the hardest in the body) is one of the best protected parts of the body. It is related to a series of tiny sensing bumps in fishes that are located along the body in rows just under the skin. These tiny bumps are used by fish to sense slight movements of water. The Organ of Corti operates in a similar way. It is filled with fluid, surrounded by other fluid and responds to movements in these fluids - those movements induced by sound waves