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1. a small network, especially a protoplasmic network in cells.
2. reticular tissue.
agranular reticulum smooth-surfaced endoplasmic reticulum.
endoplasmic reticulum an ultramicroscopic organelle of nearly all higher plant and animal cells, consisting of a system of membrane-bound cavities in the cytoplasm, occurring in two types: granular or rough-surfaced, bearing large numbers of ribosomes on its outer surface, and agranular or smooth-surfaced.
granular reticulum rough-surfaced endoplasmic reticulum.
sarcoplasmic reticulum a form of agranular reticulum in the sarcoplasm of striated muscle, comprising a system of smooth-surfaced tubules surrounding each myofibril.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
the agranular endoplasmic reticulum of skeletal and cardiac muscle; the complex of vesicles, tubules, and cisternae forming a continuous structure around striated myofibrils, with a repetition of structure within each sarcomere.
Farlex Partner Medical Dictionary © Farlex 2012
The form of endoplasmic reticulum found in striated muscle fibers.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
sar·co·plas·mic re·tic·u·lum(sahr'kō-plaz'mik rĕ-tik'yū-lŭm)
The endoplasmic reticulum of skeletal and cardiac muscle; the complex of vesicles, tubules, and cisterns forming a continuous structure around striated myofibrils, with a repetition of structure within each sarcomere.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
sarcoplasmic reticulumThe endoplasmic reticulum of a muscle cell which stores and releases calcium ions.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
sarcoplasmic reticulumthe cysternae of a single muscle fibre, equivalent to the ENDOPLASMIC RETICULUM of other cells.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005