Compléter Torso Bones and MusclesVersion en ligne Fill in the blank with the muscle or bone that is missing. par lauren brozman 1 sternum spine cage lats pecs rib abs cranium traps The is the series of bones that run down your back and protects your spinal cord . The bones that wraps around and protects your heart and lungs is called the - . The is the hard bone in the middle of your chest , also known as the chest bone . The bone that protects your brain is the , also known as the skull . The are muscles in your chest . Your stomach muscles are called . The top muscle in your neck and upper back are your . The are in your lower back and start in the middle and go up into the armpit .
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