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Muscle Structure
A very high resolution E.M reveals that each myofibril
is made up of parallel filaments.
There are 2 kinds of filament called thick & thin
filaments.
These 2 filaments are linked at intervals called cross
bridges, which actually stick out from the thick
filaments…read more

Slide 6

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Mechanism of muscle contraction
The above micrographs show that the
sarcomere gets shorter when the muscle
contracts
The light (I) bands become shorter
The dark bands (A) bands stay the same length…read more

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