Across
- 3. Muscles that you have to think about using
- 5. The part of your skeleton that protects your brain
- 9. System that provides fresh oxygen to the body
- 10. What you feel when your heart beats and sends blood through your body
- 11. Muscles that work automatically and are not under your control
- 12. The part of your skeleton that protects your heart and lungs
- 13. Your heart is made up of this
Down
- 1. The purpose of the muscular system working with your skeletal and nervous systems is to produce this
- 2. The transportation system of our body
- 4. The muscles in this area protect your digestive organs
- 5. This System provides shape and support to your body
- 6. When you inhale your _______ expand
- 7. Tubes that carry blood throughout your body
- 8. Organ made up of 4 chambers