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12
The 3 Subdivisions of Sarcomere's Band
M line
Center portion of each thick filament
H band
On either side of M line
Contains only thick filaments, no thin
Zone of Overlap
Area of overlap of thin and thick filaments
Ca2+ released from SR into this area
Center portion of each thick filament
H band
On either side of M line
Contains only thick filaments, no thin
Zone of Overlap
Area of overlap of thin and thick filaments
Ca2+ released from SR into this area
