Describe the structure, location and function of cardiac muscle fibres.

Monjur Alahi

Describe the structure, location and function of cardiac muscle fibres.


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Salim Ahmed Kawsar

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Muscles of the cardiac tissue show characteristics of both striated and nonstriated muscle fibres. 

Structure: 

1. Sarcolemma is not distinct. 

2. Uninucleate muscle fibres appear to be multinucleate. 

3. Adjacent muscle fibres join together to give branched appearance.

4. Transverse thickenings of the sarcolemma called intercalated discs form points of adhesion of muscle fibres. 

5. These junctions allow cardiac muscles to contract as a unit to aid quick transfer of stimulus. 

Location: They are found in the wall of the heart or myocardium.

Function: Cardiac muscles bring about contraction and relaxation of heart, which helps in circulation of blood throughout the body.

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