What tissue surrounds a muscle fascicle?

What tissue surrounds a muscle fascicle?

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

Answer: (D)

A muscle fascicle is a bundle of individual muscle fibers, and the tissue that wraps around that bundle is the perimysium. This connective-tissue sheath holds the fibers together and houses the blood vessels and nerves that service the fascicle. Inside the fascicle, each muscle fiber is surrounded by its own endomysium, while the entire muscle is enclosed by the epimysium. The sarcolemma is the membrane of a single muscle fiber, not the layer around a fascicle. So, the perimysium is the correct surrounding tissue.

A muscle fascicle is a bundle of individual muscle fibers, and the tissue that wraps around that bundle is the perimysium. This connective-tissue sheath holds the fibers together and houses the blood vessels and nerves that service the fascicle. Inside the fascicle, each muscle fiber is surrounded by its own endomysium, while the entire muscle is enclosed by the epimysium. The sarcolemma is the membrane of a single muscle fiber, not the layer around a fascicle. So, the perimysium is the correct surrounding tissue.