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Q.

Describe the structure of cardiac muscle.

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Detailed Solution

  • Cardiac muscle is found in the myocardium of heart of vertebrates.
  • It has short, cylindrical, branched mono-nucleate cells.
  • It has alternate dark and light bands. Hence, it is a striated.
  • The dark lines across the cardiac muscle are called intercalated discs.
  • Each myocardial cell is joined to adjacent myocardial cell by electric synapses.
  • It is involuntary in function.
  • Cardiac muscle is highly resistant to fatigue.
     
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