Most of the nerve cells are gathered together into a long central column forming the brain and spinal cord and known as the cerebro-spinal axis. A few nerve cells, however, exist in groups apart from this - notably those connected with the organs of nutrition (sympathetic nervous system) and those belonging to peripheral sensory neurons.
These aggregations of nerve cells are bound together by connective tissue and form small irregular bodies called ganglia. Small isolated groups of nerve cells within the cerebrospinal axis are usually designated by the term 'nuclei.'
Human nervous system
The Animal Cell
Nerve Cells and Nerve Fibres
Nature of the Nerve Impulse
Specific Energy of Nerves
General Construction and Development of the Nervous System
The Spinal Cord
The Chief Fibre Systems of the Cerebro-Spinal Axis
The Areas of Localisation on the Cerebral Cortex
The Sense Organs
Human Brain Anatomy
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