Index / Human Anatomy / Nervous System
Human Anatomy
Nervous System
Central & peripheral wiring
The body’s real-time signalling network. CNS (brain + spinal cord) and PNS (cranial, spinal, autonomic nerves) run together to sense, decide, and act — often in milliseconds.
Key specifications
Neurons
86 billion
Signal speed
up to 120 m/s
Nerve length
~72 km
Divisions
CNS + PNS
Sheet 009 · Plate 1 of 1 · 1:1 infographic
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