The ectoderm is one of the three primary germ layers formed during embryonic development. It is the outermost layer and gives rise to various structures in the body, including the skin, hair, nails, and the nervous system. The ectoderm plays a crucial role in forming the central nervous system and peripheral nervous system. During the process of gastrulation, the ectoderm is established alongside the mesoderm and endoderm. Each of these layers contributes to different tissues and organs in the developing organism. The ectoderm's development is essential for proper formation and function of sensory organs, such as the eyes and ears, as well as the epidermis, which is the outer layer of skin.