myofibril(redirected from Z - lines)
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Any of the threadlike fibrils that make up the contractile part of a striated muscle fiber and are made up chiefly of actin and myosin filaments.
(Biology) one of cylindrical organelles found in muscle fibre
my•o•fi•bril(ˌmaɪ əˈfaɪ brəl, -ˈfɪb rəl)
a contractile fibril of skeletal muscle, composed mainly of actin and myosin.
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|Noun||1.||myofibril - one of many contractile filaments that make up a striated muscle fiber|
sarcoplasm - the cytoplasm of a striated muscle fiber
striated muscle cell, striated muscle fiber - an elongated contractile cell in striated muscle tissue
sarcomere - one of the segments into which a myofibril is divided
n. miofibrilla, fibrilla diminuta delgada del tejido muscular.