Across
- 2. Thin-walled vessel that carries blood from body tissues and lungs back to the heart
- 5. Muscular middle layer of the heart
- 10. Instrument to measure blood pressure
- 11. Double-layered membrane surrounding the heart
- 12. Innermost lining of blood vessels
- 14. Beat of the heart as felt through the walls of the arteries
Down
- 1. node Pacemaker of the heart
- 3. Record of the electrical activity of the heart
- 4. Specialized nervous tissue in the right atrium that begins the heartbeat
- 6. Valve positioned between the right ventricle and the pulmonary artery
- 7. One of two lower chambers of the heart
- 8. Small vein
- 9. One of two upper chambers of the heart
- 10. Contraction phase of the heartbeat
- 13. One of two pairs of vessels carrying oxygenated blood from the lungs to the left atrium of the heart