4. Functions The functions of the muscular system are Locomotion, mobility, strength, heat production, shock absorption, shaping the body, maintaing posture, and respiration .Their function is to produce force and cause motion
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6. * Eye muscles are the busiest muscles in the body. Scientists estimate they may move more than 100,000 times a day!
7. * The largest muscle in the body is the gluteus maximus muscle in the buttocks.