Pbs Learning Media: Crash Course Anatomy and Physiology: Autonomic Nervous System

Take a tour of the two-part autonomic nervous system. This episode explains how your sympathetic nervous system and parasympathetic nervous system work together as foils, balancing each other out. Their key anatomical differences-where nerve fibers originate and where their ganglia are located-drive their distinct anatomical functions, making your sympathetic nervous system the "fight or flight" while your parasympathetic nervous system is for "resting and digesting." [8:48]