M Line - Definition - Glossary - PhysiologyWeb

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M line

Definition:In striated muscle sarcomere, the M line is the attachment site for the thick filaments. The M line is in the center of the A band and, thus, it is in the center of the sarcomere.Related glossary terms/phrases:A bandH zoneI bandZ disk Posted: Thursday, January 8, 2015Last updated: Wednesday, March 12, 2025 — share — Share on Facebook Share on X Share on LinkedIn Share on Pinterest Share on Reddit Email Copy URL

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