The sarcomere is the small contracting region of a muscle fiber, which has the function of housing different elements responsible for muscle contraction, these proteins are actin and myosin.
The sarcomere is defined as the smallest functional and anatomical unit of striated muscle, that is, the voluntary muscle, which contains the contractile proteins, actin and myosin.
Therefore, we can conclude that the sarcomere is the smallest and most important region of the muscle fiber that contains actin, myosin, myofilaments and myofibrils.
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