Only Anatomy Majors Can Pass This Muscle Quiz
What is the hardest-working muscle in the body?
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The hardest-working muscle in the human body is the heart. This particular muscle works to pump around two ounces of blood every time your heart beats! It’s said that a heart can beat around three billion times during a lifetime.
What is the hardest-working muscle in the body?
- Bicep
- Brain
- Heart
- Tongue
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