Human Body Skeletal System 1–3 Day Inquiry Lesson PlanEssential Question How does the human skeletal system support the body, protect organs, help movement, produce blood cells, store minerals, and work with muscles, joints, and other body systems? Directions: Use this question to guide your research. Focus on the skeletal system, bones, joints, cartilage, ligaments, skull, ribs, spine, arms, legs, marrow, blood cell production, calcium, protection, movement, posture, and health. Background