ANP 1106 Chapter Notes - Chapter 13: Radial Sulcus, Musculocutaneous Nerve, Obturator Foramen

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Jacqueline Carnegie

Document Summary

Chapter 13: the peripheral nervous system and reflex activity. A nerve is a cordlike organ that is part of the peripheral nervous system. Nerves consist of parallel bundles of peripheral axons (may be myelinated or not) enclosed by successive wrappings of connective tissue. Within a nerve, each axon is surrounded by endoneurium. A delicate layer of loose connective tissue that also encloses the fibre"s myelin sheath or neurilemma. Groups of fibres are bound into bundles or fascicles by a coarser connective tissue wrapping known as the perineurium. All fascicles are enclose by a tough fibrous sheath known as the epineurium which forms the nerve. Nerves are mostly made up of myelin, the protective connective tissue wrappings, blood vessels, and lymphatic vessels; axons are only a small fraction of the nerve"s bulk. Nerves are classified according to the direction in which they transmit impulses.