cardiac muscle: meaning, definition, pronunciation and examples
Low (C1-C2). Specialized/technical term.Formal, Academic, Medical, Technical.
Quick answer
What does “cardiac muscle” mean?
The specialized, involuntary muscle tissue found only in the heart, responsible for pumping blood.
Audio
Pronunciation
Definition
Meaning and Definition
The specialized, involuntary muscle tissue found only in the heart, responsible for pumping blood.
In medical and biological contexts, it refers to the unique striated muscle tissue of the myocardium, characterized by intercalated discs and inherent rhythmicity (automaticity).
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Minor potential differences in pronunciation.
Connotations
Purely technical/medical in both variants. No colloquial use.
Frequency
Equally low frequency in both dialects, confined to scientific/medical discourse.
Grammar
How to Use “cardiac muscle” in a Sentence
The [noun] affects/innervates/weakens cardiac muscle.Cardiac muscle [verb: contracts, relaxes, beats].Vocabulary
Collocations
Examples
Examples of “cardiac muscle” in a Sentence
adjective
British English
- The cardiac muscle biopsy revealed fibrosis.
- They studied cardiac muscle physiology.
American English
- The cardiac muscle biopsy showed fibrosis.
- They researched cardiac muscle physiology.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Core term in biology, medicine, physiology, and anatomy courses and literature.
Everyday
Extremely rare. A layperson might say 'heart muscle'.
Technical
The standard, precise term in medical reports, research papers, and clinical discussions.
Vocabulary
Synonyms of “cardiac muscle”
Strong
Neutral
Weak
Vocabulary
Antonyms of “cardiac muscle”
Watch out
Common Mistakes When Using “cardiac muscle”
- Pronouncing 'cardiac' as /kɑːrˈdaɪ.æk/ (stress on the second syllable). Correct stress is on the first syllable.
- Using it as a countable noun (e.g., 'cardiac muscles'). It is typically an uncountable mass noun referring to the tissue type.
- Confusing it with the adjective 'cardiac' meaning 'related to the heart' in general.
FAQ
Frequently Asked Questions
Essentially, yes. 'Myocardium' is the anatomical name for the middle layer of the heart wall, which is composed almost entirely of cardiac muscle tissue. The terms are often used interchangeably in context.
No. Cardiac muscle is involuntary (autorhythmic). Its contractions are initiated by the heart's own pacemaker cells and regulated by the autonomic nervous system, not by conscious thought.
Its sole function is to contract in a coordinated manner to pump blood from the heart chambers into the circulatory system (the aorta and pulmonary artery).
It is striated like skeletal muscle but involuntary like smooth muscle. It is mononucleated, has intercalated discs for cell communication, and exhibits automaticity (can generate its own electrical impulses).
The specialized, involuntary muscle tissue found only in the heart, responsible for pumping blood.
Cardiac muscle is usually formal, academic, medical, technical. in register.
Cardiac muscle: in British English it is pronounced /ˈkɑː.di.æk ˈmʌs.əl/, and in American English it is pronounced /ˈkɑːr.di.æk ˈmʌs.əl/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. It is a technical term.”
Learning
Memory Aids
Mnemonic
Think 'CARD'iac – your heart is the central 'card' in the system. The muscle for that card is the cardiac muscle.
Conceptual Metaphor
THE HEART IS A PUMP (cardiac muscle is the pump's engine).
Practice
Quiz
Which of the following is a key characteristic of cardiac muscle?