एरोप्लेन यूजेस 500 लीटर ऑन फ्यूल इन द टेन मिनट्स हाउ मच एस फ्यूल इन नीडेड फॉर एयर फ्लाइट
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A sarcomere is the basic contractile unit of muscle fiber. Each sarcomere is composed of two main protein filaments—actin and myosin—which are the active structures responsible for muscular contraction. The most popular model that describes muscular contraction is called the sliding filament theory.
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