Our muscular system covers our bodies from head to toe. It helps keep us upright and gives us the power to stand, sit, run, smile, and more. Did you know that your muscles make up one-third of your body weight? Or that your tongue is made up of eight...
Our muscular system covers our bodies from head to toe. It helps keep us upright and gives us the power to stand, sit, run, smile, and more. Did you know that your muscles make up one-third of your body weight? Or that your tongue is made up of eight...