Skeletal Muscle Structural Terms

endomysium

connective tissue covering surrounding individual muscle fibers

epimysium

connective tissue covering surrounding the muscle

permysium

connective tissue surrounding a fascicle

T tubules

finger like invaginations of plasma membrane; extend into interior of fibers and surround myofibrils

sarcolemma

plasma membrane of skeletal muscle fiber

myofibrils

rod like structures within skeletal muscle fibers that contain thin and thick filaments organized into sarcomeres

sarcomeres

smallest contractile unit within individual muscle fibers

sarcoplasmic reticulum

stores calcium within muscle fiber

triad

two terminal cisternae and a t tubule