Z disk — Free Physiology Illustration | GPAI | GPAI

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Z disk — Free Physiology Illustration | GPAI | GPAI

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Z disk

Z disk

Physiology

Z disk

A narrow, dense transverse band crossing the full width of a myofibril and marking the boundary of a sarcomere. It appears as a thin dark vertical line or flat rectangular plate, distinctly darker than the surrounding filaments. The structure serves as the anchoring line for thin filaments and may be shown with either a crisp straight edge or a subtle zigzag/serrated profile while remaining compact and sharply defined.

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