Canadian Medical Guide > Anatomy > Musculoskeletal System > Muscles > Muscle Fibers > Myofibrils Terms and Definitions




Myofibrils

Medical Definition: Highly organized bundles of actin (=ACTINS), MYOSINS, and other proteins in the cytoplasm of skeletal and cardiac muscle cells that contract by a sliding filament mechanism.
Guide Notes: does not include muscle fibers ( = MUSCLE FIBERS or specific)
Myofibrils Categories.
Canadian Medical Guide Definition Sarcomeres - The repeating contractile units of the myofibril, delimited by Z bands along its length.

Myofibrils Medical Definitions and Terms

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