Myofibrils are the building blocks or contractile unit of each muscle fiber. The tiniest functional unit of skeletal muscle, the sarcomere, is found in the myofibrils and is made up of protein filaments: actin (thin) and myosin (thick).
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Over-straining yourself or changing workouts routines
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Explanation:
examples
It gives us an opportunity to focus on specialization.
Selective breeding can be used to refine a species.
The desirable traits for humans may not be reflective of species’ needs.
It helps to provide a food chain with better sustainability.
