Across
- 5. — Outermost layer of the heart wall
- 7. — One-way valve between right ventricle and pulmonary artery
- 8. — Fibrous cords that prevent AV valve inversion
- 10. — Second heart sound
- 11. — Muscles that stabilise AV valves
- 13. — Phase of relaxation and filling
- 14. — Valve between left atrium and left ventricle
- 16. — Valve between right atrium and right ventricle
- 17. — Heart sound caused by AV valve closure
- 18. — Upper chamber that receives blood
Down
- 1. — Lower chamber that pumps blood to the body
- 2. — Irregular muscular ridges inside ventricles
- 3. — Structure that connects septum to anterior papillary muscle in RV
- 4. — Large artery leaving the left ventricle
- 6. — Vessel carrying deoxygenated blood from RV to lungs
- 9. — Remnant of fetal opening in atrial septum
- 12. — Smooth outflow tract of the right ventricle
- 14. — Thick muscular middle layer of the heart
- 15. — Phase of the cardiac cycle when ventricles contract