human body
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What makes muscles grow?TED 2021. 3. 11. 23:19
information tags: Health, Public Health, Human Body length: 4:04 Summary Muscle is essential for our life. For example, When you want pull door, your brain send signal to your arm nureons. If this activity need more power, first send more signal, if is not enough, second they appeal more muscle, back and feet, etc.. muscle, to participaint this activity. If you do activity, your muscles get chan..