More trip calculations. 1  driving time from Rome, Italy to Lucca, Italy. 2  reverse drive distance from Lucca, Italy to Rome, Italy. 3  halfway between Rome, Italy and Lucca, Italy. 4  hotels near Lucca, Italy. 5  flight distance from Rome, Italy to Lucca, Italy. 6  flight time from Rome, Italy to Lucca, Italy.
Surrounding each muscle fiber (cell) is a delicate external lamina composed primarily of reticular fibers. This external lamina is produced by the muscle fiber and, when observed through the light microscope, cannot be distinguished from the cell membrane of the muscle fiber, the sarcolemma.
The myelin sheath is a protective covering that surrounds fibres called axons, the long thin projections that extend from the main body of a nerve cell or neuron.This sheath is composed of protein and lipids.he myelin sheath is a protective covering that surrounds fibres called axons, the long thin projections that extend from the main body of a nerve cell or neuron.