What are the whitish cords made up of bundles of nerve fibers, held together by connective tissue that make up the nervous system called?

• A. Nerves
• B. Neurons
• C. Axons
• D. Synapses

Answer: (A)

Bundles of nerve fibers wrapped in connective tissue that form whitish cords in the nervous system are nerves. These structures belong to the peripheral nervous system and act as the communication channels, carrying sensory information to the brain and motor commands from it. Each nerve is made up of many axons—the long extensions of nerve cells—organized into fascicles and protected by layers of connective tissue: endoneurium around individual fibers, perineurium around each fascicle, and epineurium surrounding the entire nerve. The white appearance comes from the myelin sheath that often covers many axons. Neurons are the cells that generate impulses; axons are the individual nerve fibers; and synapses are the junctions between neurons. The term that describes the cord-like bundle of fibers held together by connective tissue is nerves.