The nervous system has its origin in the well-known ectodermic germinal layer. During the postnatal life, the nervous system is clearly differentiated in central nervous system and peripheral nervous system. During the embryonic stage, all the components follow different paths but they are still close to each other. This review focuses on the central nervous system and development of the sense organs. It includes a brief review of processes such as gastrulation, neurulation and development of cranial placodes and the structures that make up the central nervous system and the sense organs.