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 The researchers behind the paper, based at Harvard, decided to use cardiac muscle cells to power their robot. John Timmer, Ars Technica, 14 Feb. 2022 The whole thing was powered by putting it in a solution with sugar, which the cardiac muscle cells would absorb. John Timmer, Ars Technica, 14 Feb. 2022 Researchers built the fish using paper, gelatin, two layers of cardiac muscle tissue—one on the left side and one on the right—and a plastic fin, per the study. Margaret Osborne, Smithsonian Magazine, 14 Feb. 2022 The findings, though preliminary, indicate it’s possible to prod cardiac muscle cells into regenerating, at least long enough to stave off some of the worst after-effects of a heart attack. Megan Molteni, STAT, 3 July 2021 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 See More

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.

First Known Use of cardiac muscle

1846, in the meaning defined above

Learn More About cardiac muscle

Time Traveler for cardiac muscle

Time Traveler

The first known use of cardiac muscle was in 1846

See more words from the same year

Dictionary Entries Near cardiac muscle

cardiac jelly

cardiac muscle


See More Nearby Entries 

Statistics for cardiac muscle

Cite this Entry

“Cardiac muscle.” Dictionary, Merriam-Webster, Accessed 13 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

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

More from Merriam-Webster on cardiac muscle Encyclopedia article about cardiac muscle


Test Your Vocabulary

Odd Habits and Quirks

  • image1926873504
  • Which of the following best describes an easily irritated person?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!