Which system protects the body from harmful bacteria, sunlight, and injury? skeletal system muscular system integumentary system nervous system user: the is the outer layer of the skin, which makes the body waterproof, gives it color, and to maintain hydration levels.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.