Most books (ex: Guyton Phys) classify the ANS as such: Parasympathetic Div Sympathetic Div Other books (ex: Netter's Clinical Anatomy) classify the ANS as such Parasympathetic Div Sympathetic Div Enteric Div I am a little confused about classifications of the Autonomic Nervous System (ANS). Who is right? Are there 2 ANS divisions or 3? Isn't the Enteric Div supposed to be part of the Parasympathetic Div? I hate it when I can't get my books to agree. Anyone know for sure?