Biology › Section N · Nervous and sensory systems › Topic N.1
Neurons and glial cells
The nervous system runs on two cell casts: neurons, the wires that carry signals, and glia, the workers that wire, insulate, feed, and guard them — and the wires could not run without the workers.
In this topic
- From nerve net to brain
- Wires and workers
- Anatomy of a neuron
- Four shapes of signalling
- Worked example: Name that neuron
- Glial cells: more than a supporting cast
- The CNS crew
- The PNS crew, and why myelin matters
- You can grow new neurons
- Worked example: Counting newborn brain cells
- Common mistakes to avoid
- Key takeaways
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