musical artist and instrument

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Muscle fibers are combined into a kind of bundles

Here in such☝🏻

These muscle bundles are enclosed in a special shell - the perimysium A group of bundles is combined into another connective tissue shell - epimysium.

Why does a muscle need such a complex system?

Thanks to the bundles, the musculature can have a unique structure, since the bundles can go in different directions. Accordingly, perform different functions.

For example, the calf muscle has a feathery structure — it provides great strength, but a small amplitude and speed of movements.
But the flexors of the arm have a spindle-shaped structure — the body sacrifices force in favor of speed and amplitude.

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