Anatomy of a Muscle Flashcards
Endomysium
Surrounds each muscle cell
Fascicle
A bundle of muscle cells
Perimysium
Surrounds each fascicle
Epimysium
Surrounds a bundle of fascicles
Fusiform
Thick in the middle, tapers on both ends
Convergent
Thick attachment on one end that tapers on the other.
Pennate
Feather like
Sarcolemma
Similar to cell membrane
Sarcoplasm
Contains glycogen stores.
Myofibrils
Contains the myofilaments actin and myosin
Actin
Thin filaments
Myosin
Thick Filaments
Titin
Elastic Filaments
Fascicle Arrangements of Muscle Fiber
Fusiform, Parallel, Convergent, Pennate, Circular
Structural Organization of a Muscle
Endomysium, Fascicle, Perimysium, Epimysium
A-Band
Areas where there is myosin, the dark band
I-Band
Areas where there is actin but no myosin, thin filaments only, the light bands
H-Band
Area where there is no actin, thick filaments only
Z-Disk
Composed of connexon, anchors thin filaments and connects the myofibrils across width of muscle cell
M-Line
Thick filaments linked by accessory proteins