| muscle b. |
one of the primary longitudinal subdivisions of a muscle, made up of muscle fibers and separated from other bundles by fascial septa or perimysium.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| muscle c. |
any contractile cell peculiar to muscle. Smooth muscle cells are elongated spindle-shaped cells containing a single nucleus and longitudinally arranged myofibrils. For cardiac and skeletal muscle cells, see muscle fiber, under fiber. Called also myocyte.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| muscle f. |
any of the cells of skeletal or cardiac muscle tissue. Skeletal muscle fibers are cylindrical multinucleate cells containing contracting myofibrils, across which run transverse striations, enclosed in a sarcolemma. Cardiac muscle fibers contain one or sometimes two nuclei and myofibrils and are separated from one another by an intercalated disk; although striated, cardiac muscle fibers branch to form an interlacing network. See also muscle cell, under cell.
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| muscle f.’s, fast twitch |
paler-colored muscle fibers of larger diameter than slow twitch fibers, and having less sarcoplasm and more prominent cross-striping; used for forceful and rapid contractions over short periods of time.
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| muscle f.’s, intermediate |
muscle fibers having characteristics intermediate between red and white muscle fibers.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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