T tubules

T tubules
the transverse intracellular tubules invaginating from the cell membrane and surrounding the myofibrils of the T system of skeletal and cardiac muscle, serving as a pathway for the spread of electrical excitation within a muscle cell, enabling the nearly simultaneous activation of all myofibrils; in skeletal muscle, a T tubule is the intermediate element of a triad of tubular structures, the other elements being a pair of terminal cisterns. See also T system, under system, terminal cistern, under cistern, and triad of skeletal muscle.

Medical dictionary. 2011.

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  • tubules — tu·bule || tuːbjuːl / tju n. small tube, small hollow cylinder …   English contemporary dictionary

  • TUBULES — …   Useful english dictionary

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  • Malpighian tubules — (ARTHROPODA) Long, thin excretory tubules extending into the body cavity from the posterior region of the gut in insects, arachnids and myriapods …   Dictionary of invertebrate zoology

  • Malpighian tubules — n. a group of small, tubular, excretory and water regulating glands that open into the hind part of the alimentary canal in most insects and spiders * * * …   Universalium

  • Kobelt tubules — Ko·belt tubules (koґbəlt) [Georg Ludwig Kobelt, German physician, 1804–1857] see under tubule …   Medical dictionary

  • dental tubules — dentinal tubules dental canaliculi; see under canaliculus …   Medical dictionary

  • Ferrein tubules — the portions of the renal tubules making up the radii medullares …   Medical dictionary

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