Memory Bones, Muscles, LungsVersion en ligne Skeletal and Muscular System par Elizabeth Lowes Protects Heart and Lungs Breathe IN Protects Brain Mineral that makes bones strong Protein Made from Tobacco plant Skull Strongest muscle Food Group that builds muscle Calcium Breath OUT Carbon Dioxide Jaw muscle Cigarettes INvoluntary muscle Longest Bone ribcage Oxygen Leg / Thigh bone (Femur) Intestines