MUSCLE PHYSIOLOGY

Detailed explanation-1: -Each bundle of muscle fiber is called a fasciculus and is surrounded by a layer of connective tissue called the perimysium. Within the fasciculus, each individual muscle cell, called a muscle fiber, is surrounded by connective tissue called the endomysium.

Detailed explanation-2: -The endomysium is the key element that separates single muscle fibres from one another. It allows their autonomous gliding during muscle contraction. The endomysium is also a highly deformable tissue that adapts itself to the changes of volume that occur during the muscle fibre contraction.

Detailed explanation-3: -The endomysium, a fine layer of connective tissue, wraps each muscle fiber and separates it from neighboring fibers. Another layer of connective tissue, the perimysium, surrounds a bundle of up to 150 fibers called a fasciculus. A fascia of fibrous connective tissue, the epimysium, surrounds the entire muscle.