释义 |
cardiac muscle
cardiac musclen. The specialized striated muscle tissue of the heart; the myocardium.car′diac mus`cle n. 1. a specialized form of striated muscle in the hearts of vertebrates. 2. the myocardium. [1900–05] cardiac muscleInvoluntary striated muscle, found only in the heart. See muscle.ThesaurusNoun | 1. | cardiac muscle - the muscle tissue of the heart; adapted to continued rhythmic contractionheart musclemuscular tissue, muscle - animal tissue consisting predominantly of contractile cellsticker, heart, pump - the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body; "he stood still, his heart thumping wildly"cardiac pacemaker, SA node, sinoatrial node, pacemaker - a specialized bit of heart tissue that controls the heartbeatpapillary muscle - any of several muscles associated with the atrioventricular valves; "the papillary muscles contract during systole to prevent regurgitation of blood into the atria"atrioventricular bundle, atrioventricular trunk, bundle of His, truncus atrioventricularis - a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contractatrioventricular node - a node of specialized heart muscle located in the septal wall of the right atrium; receives impulses from the sinoatrial node and transmits them to atrioventricular bundlemyocardium - the middle muscular layer of the heart wallPurkinje fiber - a specialized cardiac muscle fiber that is part of the Purkinje networkPurkinje network, Purkinje's system, Purkinje's tissue - a network of Purkinje fibers that carry the cardiac impulse from the atrioventricular node to the ventricles of the heart and causes them to contract |
cardiac muscle
cardiac muscle[′kärd·ē‚ak ¦məs·əl] (histology) The principal tissue of the vertebrate heart; composed of a syncytium of striated muscle fibers. cardiac muscle
car·di·ac mus·clethe involuntary muscle comprising the myocardium and walls of the pulmonary veins and superior vena cava, consisting of anastomosing transversely striated muscle fibers formed of cells united at intercalated discs; the one or two nuclei of each cell are centrally located and the longitudinally arranged myofibrils have considerable sarcoplasm around them; connective tissue is limited to reticular and fine collagenous fibers; contraction is rhythmic and intrinsically stimulated. Synonym(s): muscle of heartcardiac musclen. The specialized striated muscle tissue of the heart; the myocardium.car·di·ac mus·cle (kahr'dē-ak mŭs'ĕl) The muscle forming the myocardium, consisting of anastomosing transversely striated muscle fibers formed of cells united at intercalated discs. Synonym(s): muscle of heart. Fig. 91 Cardiac muscle . The intercalated discs enable the rapid transmission of excitatory waves across the tissue. cardiac muscle a type of vertebrate muscle found only in the HEART, which appears to be halfway between INVOLUNTARY MUSCLE and STRIATED MUSCLE in that its fibres are striated, but contain a single nucleus (see Fig. 91 ). The action of cardiac fibres is to produce strong and rhythmic contractions from within, even when removed from the body (see MYOGENIC CONTRACTION). Unlike striated muscle, cardiac muscle does not become fatigued even though it is repeatedly stimulated. The heartbeat is controlled by the AUTONOMIC NERVOUS SYSTEM.cardiac muscle
Synonyms for cardiac musclenoun the muscle tissue of the heartSynonymsRelated Words- muscular tissue
- muscle
- ticker
- heart
- pump
- cardiac pacemaker
- SA node
- sinoatrial node
- pacemaker
- papillary muscle
- atrioventricular bundle
- atrioventricular trunk
- bundle of His
- truncus atrioventricularis
- atrioventricular node
- myocardium
- Purkinje fiber
- Purkinje network
- Purkinje's system
- Purkinje's tissue
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