cardiac muscle


Definition of cardiac muscle

: the principal involuntary-muscle tissue of the vertebrate heart made up of striated fibers joined at usually branched ends and functioning in synchronized rhythmic contraction

Examples of cardiac muscle in a Sentence

Recent Examples on the Web In the neuromuscular area, the company is looking into multiple diseases driven by genetic defects in skeletal muscle, cardiac muscle and the peripheral nervous system. Mike Freeman, San Diego Union-Tribune, 1 Mar. 2021 To figure out what cells the virus might infect, the researchers directed stem cells to produce cardiac muscle cells, then exposed those to the virus. John Timmer, Ars Technica, 3 Sep. 2020 The first study, conducted by German researchers, found that SARS-CoV-2, the virus that causes COVID-19, can make its way to cardiac muscle tissue in the heart. Maggie O'neill,, 29 July 2020 Coronavirus has previously been found to invade heart tissue because cardiac muscle cells are rich in ACE2 receptors -- a molecular doorway used by the coronavirus, according to the American Heart Association. Michael Nedelman And Mark Lieber, CNN, 18 May 2020 Thinking in a New Way A normal heart beats when its organic pacemaker sends out regular, timed electrical signals through the cardiac muscle. Lisa Sanders, New York Times, 30 Oct. 2019 By encouraging growth of new muscle, the treatment, called VentriGel, is intended to reduce scar formation and increase cardiac muscle. San Diego Union-Tribune, 16 Sep. 2019 The transplant surgeons had clipped some pieces of Astrea’s cardiac muscle. New York Times, 21 May 2018 In the heart, this causes cardiac muscle cells to contract with more force than necessary, for instance. Beth Mole, Ars Technica, 21 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cardiac muscle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of cardiac muscle

circa 1881, in the meaning defined above

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Time Traveler for cardiac muscle

Time Traveler

The first known use of cardiac muscle was circa 1881

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Statistics for cardiac muscle

Cite this Entry

“Cardiac muscle.” Dictionary, Merriam-Webster, Accessed 14 Jun. 2021.

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More Definitions for cardiac muscle

cardiac muscle


Medical Definition of cardiac muscle

: the principal muscle tissue of the vertebrate heart that is made up of elongated striated muscle fibers each of which consists of a single cell that has an intrinsic rhythm of contraction and relaxation even when isolated, is joined physically at its often branched ends to other such cells by intercalated disks, and in intact myocardial tissue is synchronized to function in contraction especially by electrical signals of extrinsic origin passing through gap junctions in the intercalated disks — compare smooth muscle, striated muscle

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