Autonomic fibers connecting to viscera

nerve fibers (fascicle) is, in turn, enclosed in a sleeve of looser connective tissue called the perineurium. A small amount of loose connective tissue called endoneurium surrounds individual nerve fibers (figs. 11.24 and 11.25). Blood vessels in the epineurium and perineurium give rise to a network of capillaries in the endoneurium that provides oxygen and nutrients to the neurons.

Shier-Butler-Lewis: III. Integration and 11. Nervous System II: © The McGraw-Hill

Human Anatomy and Coordination Divisions of the Nervous Companies, 2001

Physiology, Ninth Edition System

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Essentials of Human Physiology

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