Medical term:
myofibrillae
myofibril
[mi″o-fi´bril]one of the slender threads of a muscle fiber, composed of numerous myofilaments; called also muscle fibril. adj., adj myofi´brillar.
Bundles of myofibrils in a muscle. From Damjanov, 2000.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
my·o·fi·bril
(mī'ō-fī'bril),One of the fine longitudinal fibrils occurring in a skeletal or cardiac muscle fiber comprising many regularly overlapped ultramicroscopic thick and thin myofilaments.
Synonym(s): muscular fibril, myofibrilla
[myo- + Mod. L. fibrilla, fibril]
Farlex Partner Medical Dictionary © Farlex 2012
myofibril
(mī′ə-fī′brəl, -fĭb′rəl)n.
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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
myofibril
A bundle of contractile fibres within muscle cells.Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
my·o·fi·bril
(mī'ō-fī'bril)One of the fine longitudinal fibrils occurring in a skeletal or cardiac muscle fiber and consisting of many regularly overlapped ultramicroscopic thick and thin myofilaments.
[myo- + Mod. L. fibrilla, fibril]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
myofibril
a microscopic contractile filament of STRIATED MUSCLE, made up of a series of SARCOMERES. The myofibril is made up of numerous longitudinal filaments of two forms, thick (MYOSIN) and thin (ACTIN). See MUSCLE, I-BAND. Relatively little is known of the contraction of smooth muscle, where contractile elements’ are thought to contain both actin and myosin.Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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