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MUSCLE PHYSIOLOGY

Skeletal Muscle: Organization

Twodimensional schema ot myofilaments. Three-dimensional arrangement

Epimysium

Figurę 3.1 Organization of Skeletal Muscle

Skeletal musde is specialized for voluntary movemenŁ The musde fiber is a multinudeated celi that contains thc contractile elements, called myofilaments. The myofilaments are organized as myofibrils within the fiber. Groups of muscle fibers are organized into muscle

fasddes, which in tum are grouped to form a musde. The regular arrangement of the myofibrils gives skeletal muscle a striated appeąr-ance under the micrnscope.

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