Question

write about the cardiac muscle ​

Answer 1

The muscles that are controlled by the heart.

Answer 2

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Muscles of this tissue show characters of both striated and non-striated fibres. Sarcolemma is not distinct. Hence uni-nucleate muscle fibres appear to be multi-nucleate. Adjacent muscle fibres join together to give branched appearance to the tissue. Points of adhesion of muscle fibres are formed by transverse thickenings of sarcolemma called intercalated discs.

These junctions at places allow cardiac muscles to contract as a unit. i.e. It helps in quick transfer of stimulus. The cardiac muscles are striated involuntary muscles.

Some mammalian cardiac muscles aremodified are capable of generating impulse on their own. Hence mamalian heart is a myogenic heart. In some animals, cardiac muscles need neural stimulus to initiate the contraction. Such a heart is called neurogenic heart. Cardiac muscles form myocardium of the heart wall.