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