N5 - Nerves in the Spinal Cord
N6 - Neuron
N7 - Brain Ventricles
N8 - Cerebrospinal Fluid Circulation
N9 - Median of Head
N10 - Nervous System
N11 - Half Head
N12 - 4 Part Human Brain
N13 - Horizontal Sect. of Head
N14 - Brain Stem