Across
- 4. The system that uses the lungs
- 6. A contraction which uses the muscle but not the joint
- 9. Carries blood away from the heart with oxygen
- 10. Humans breathing apparatus
- 12. Tension remains unchanged and the muscles length changes
- 14. One cell blood vessels
Down
- 1. Can cause raised blood pressure
- 2. Muscle that pumps blood around the body
- 3. The system that uses the heart
- 5. The valve on the right side of the heart
- 7. Can cause strokes and heart failure
- 8. Carries oxygen-depleted blood towards the heart
- 11. The largest artery
- 13. The valve on the left side of the heart
- 15. Where gaseous exchange happens