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covering that surrounds the entire muscle
epimysium

a bundle of muscle cells
fascicle

covering that surrounds fascicles
perimysium

covering that surrounds individual muscle fiber
endomysium

Many of these put together forms a muscle fiber
made out of bundles of myofilaments
allow muscles to contract
Myofibril

2 types:
1. Actin - thin filaments
2. Myosin - think filaments
Myofilament

AB- Where you only find thin filaments
I band (diagram)

AD- thin filament
Actin (diagram)

AE- boundary between two sarcomeres
z line (diagram)

BC- entire functional unit of muscle
Sarcomere (diagram)

AC- portion of sarcomere containing both actin and myosin
A Band (diagram)

BD- thick filament
Myosin (diagram)