Anatomy and Physiology of Children and Adolescents - M. R. Sapin 2007

Nervous System (General Layout of the Structure and Development of the Nervous System)
Peripheral Nervous System

The Peripheral Nervous system is formed by ganglia (spinal, cranial, and autonomic), as well as nerves (31 pairs of spinal and 12 pairs of cranial), their branches and nerve endings, receptors (sensory), and effectors. Each nerve consists of nerve fibers, both myelinated and unmyelinated. On the outside, the nerve is surrounded by a Connective Tissue sheath called the epineurium, which contains Blood Vessels supplying the nerve. Within the nerve, bundles of nerve fibers are distinguished, which are covered by a thin connective tissue sheath called the perineurium, while individual fibers are surrounded by the endoneurium.

Depending on their Location, origin, and associated ganglia, Cranial and Spinal Nerves are distinguished.



Last update: 10/08/2026

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