Approximately 80% of a muscle fiber's volume are the myofibrils.This characteristic reflects muscles ability to ________.

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The myofibrils contain the contractile units called sarcomeres, which are responsible for generating contractile force and producing movement. Therefore, the high volume of myofibrils in muscle fibers reflects the muscle's ability to produce movement through contractile force.

Approximately 80% of a Muscle Fiber's Volume Are the Myofibrils