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