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