Question

the middle thickpart of muscle is called as​

Answer 1

Answer:

The middle of the H zone has a vertical line called the M line, at which accessory proteins hold together thick filaments. Both the Z disc and the M line hold myofilaments in place to maintain the structural arrangement and layering of the myofibril.

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Answer 2

Answer:

Myofibril

in heart

Myocardium

Explanation: