connective tissue covering entire muscle
covers outside of epimysium
visible bundles composed of muscle fibers that make up the whole muscle
connective tissue that covers muscle fasciculi
make up the fasciculi; also known as a muscle cell
connective tissue layer that covers muscle fibers
cytoplasm of the muscle fiber
threadlike structure composed of myofilaments that extends the length of the muscle fiber
thin myofilament that looks like a string of pearls
provides calcium attachment sites; part of actin myofilament
exposes calcium attachment sites; part of actin myofilament
thick myofilament; looks like golf clubs
basic structural and functional unit of skeletal muscle; smallest part that can contract on its own
beginning and end of a sarcomere
light zone; has actin only; shortens during contraction
dark zone; has both actin and myosin overlapping
center of sarcomere; space between actin; disappears during contraction; second light zone
middle of sarcomere
cell membrane of muscle fiber
connects sarcoplasmic reticulum
specialized smooth ER; high calcium concentration
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