Which connective tissue layer surrounds a single muscle fibre?

• A. Endomysium
• B. Perimysium
• C. Epimysium
• D. Fascia

Answer: (A)

The layer that directly surrounds an individual muscle fibre is the endomysium. This thin, loose connective tissue wraps each muscle cell, creating a tiny sleeve that keeps neighboring fibers separate while still allowing close interaction. Within the endomysium lie capillaries and nerve endings that supply each fibre, supporting nutrient delivery, waste removal, and neural control. It also helps transmit the force generated by the contracting muscle fibre to the surrounding tissue, aiding coordinated movement.

In contrast, the perimysium groups fibres into bundles called fascicles, the epimysium encloses the entire muscle, and fascia refers to the broader connective tissue that surrounds groups of muscles or large muscle regions.