English > heart muscle: 1 sense > noun 1, body| Meaning | The muscle tissue of the heart; adapted to continued rhythmic contraction. |
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| Synonym | cardiac muscle |
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| Part of | heart, pump, ticker | The hollow muscular organ located behind the sternum and between the lungs |
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| Narrower | Purkinje fiber | A specialized cardiac muscle fiber that is part of the Purkinje network |
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| Purkinje network, Purkinje's tissue, Purkinje's system | 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 |
| atrioventricular bundle, bundle of His, atrioventricular trunk, truncus atrioventricularis | A bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract |
| atrioventricular node | A node of specialized heart muscle located in the septal wall of the right atrium |
| myocardium | The middle muscular layer of the heart wall |
| pacemaker, cardiac pacemaker, sinoatrial node, SA node | A specialized bit of heart tissue that controls the heartbeat |
| papillary muscle | Any of several muscles associated with the atrioventricular valves |
| Broader | muscle, muscular tissue | animal tissue consisting predominantly of contractile cells |
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| Spanish | músculo cardíaco |
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| Catalan | miocardi |
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