The nervous system is a complex system that controls all the functions of the body. It is composed of nerve centres, which are responsible for receiving, integrating and transmitting information, and nerve pathways, which are responsible for conducting this information. It represents a rapid control system for many functions (muscular contraction, heartbeat, breathing, etc.). This system is made up of highly specialised cells: the neurons, which inform the individual about variations in his environment or internal changes in his body. The medical discipline studying the nervous system and its pathologies is neurology.The nervous system brings together a group of organs that work in coordination. It is divided anatomically into two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS).This book is intended for students enrolled in the MASTER 1 in Neurobiology, this manual summarizes the entire anatomy of the nervous system, it is an essential guide for students in neuroscience.