Why do cardiac muscles never get fatigued?

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Question

(B) Cardiac muscles are specialized muscles that form the contractile tissue of the heart.They are characterized by being involuntary,striated,and bra

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They have a high density of mitochondria and a rich blood supply.

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(B) Cardiac muscles are specialized muscles that form the contractile tissue of the heart.They are characterized by being involuntary,striated,and branched,allowing for coordinated contraction.Cardiac muscles never get fatigued primarily because they possess a very high density of $mitochondria$ to ensure a continuous supply of $ATP$ through aerobic respiration.Additionally,they receive a rich and constant blood supply,which provides the necessary oxygen and nutrients to sustain their continuous,rhythmic,and non-fatiguing activity throughout an individual's life.

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