The ectoderm is the outermost germ layer.  It gives rise to the entire nervous system including the brain and spinal cord; the epidermis including hair, nails and skin; and the neural crest including pigment cells, craniofacial cartilage, and peripheral neurons.

Nervous System Nervous System Neural Crest Neural Crest Epidermis Epidermis Respiratory System (Insects) Respiratory System (Insects)
Ectodermal Placodes Ectodermal Placodes