The vestibular apparatus is represented by semicircular canals located in three mutually perpendicular planes, filled with liquid, in the walls of which there are receptors and crystals of calcium carbonate. When the position of the head changes, the crystals act on the receptors, and the impulses enter the brain, in response the cortex sends impulses to the skeletal muscles to restore balance.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.