Endomysium is the name given to the fine sheath of connective
tissue layer of reticular fibers that surrounds (covers) each
includes includes blood
nerves and lympathics.
Above: Cross-Section of a fasicle, showing the endomysium surrounding
each muscle fibre.
(The single muscle fibre cut-away shows the sarcolemma
below the endomysium.)
Endomysium should not be confused with other layers of
connective tissue located in the structure of muscles, such as perimysium or sarcolemma.
Layers of muscle tissue are located as follows:
- Sarcolemma is the cell membrane that encloses each muscle
cell (also known as a muscle fibre).
- Endomysium is connective tissue that wraps each individual muscle
- Perimysium is connective tissue that wraps bundles of muscle fibres
- the "bundles" being known as fasicles.
- Epimysium is connective tissue that wraps the whole muscle.
- Fascia (or "deep fascia") covers the entire muscle and is located over
the layer of epimysium.