ANATOMY

Detailed explanation-1: -M line: M line contains the protein called myomesin and it marks the centre of the sarcomere. H zone: it is the area between the M line and Z disc and this zone contains only the myosin.

Detailed explanation-2: -The A band is the area in the center of the sarcomere where thick and thin filaments overlap. This gave researchers an idea of myosin’s central location. Within the A band is the H zone, which is the area composed only of thick myosin.

Detailed explanation-3: -Z line (Z band) The thin membrane that separates adjacent sarcomeres in the fibres of striated muscle. It is visible under an electron microscope as a thin dark line in the middle of a lighter band.

Detailed explanation-4: -The striated appearance of muscle results from the alternation of thick-filament-containing (A-Band) and thin-filament-containing (I-band) regions. The center of each A-band consists of a specialized region (M-line).