Each muscle is wrapped in a sheath of dense, irregular connective tissue called the epimysium, which allows a muscle to contract and move powerfully while maintaining its structural integrity. The epimysium also separates muscle from other tissues and organs in the area, allowing the muscle to move independently.

What does a epimysium do?

Epimysium (plural epimysia) (Greek epi- for on, upon, or above + Greek mys for muscle) is the fibrous tissue envelope that surrounds skeletal muscle. It is a layer of dense irregular connective tissue which ensheaths the entire muscle and protects muscles from friction against other muscles and bones.

How does the endomysium work?

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.