Across
- 1. The hard parts that make up your skeleton (plural)
- 3. The muscular organ that pumps blood
- 5. System that helps you breathe (____________ system)
- 7. Blood ____________: tubes that carry blood through your body
Down
- 2. System that gives your body its shape and support (____________ system)
- 4. System that sends messages through your body (____________ system)
- 6. The organ that delivers oxygen to your body (plural)