How many parts of a humanoid robot use bearings? Which parts are they?

From the head to the feet, bearings are integrated into various parts of a humanoid robot to facilitate rotation, bending, and intricate movements. Key areas where bearings are used include the head/neck (for turning and tilting), shoulders (for arm movement), elbows (for bending), wrists (for precise hand movements), and hips (for leg rotation). Bearings are also essential in the knees, ankles, fingers, hands, and waist, enabling the robot to walk, grasp objects, and rotate its torso. Additionally, bearings are found in actuators, feet, and internal rotating components like sensors and motors, all of which ensure the robot performs tasks with precision, stability, and efficiency.