Across
- 2. the thin-walled blood vessels with semi-permeable membranes to allow for gas exchange
- 7. Cavity the space between the pericardium and the epicardium
- 10. divides the heart into left and right parts
- 11. Circulation when blood is pumped from the heart to the lungs and then back to the heart
- 13. System circulates oxygen-rich blood throughout the body
- 15. Valves located between the atrial and ventricular chambers in the right and left sides of the heart
- 16. the contraction of the ventricles
- 18. the heart is enclosed by this fibroserous sac
- 20. using a stethoscope to listen to the heart
Down
- 1. the relaxation of the ventricles
- 3. the innermost layer that lines the four chambers and covers the valves of the heart
- 4. the thin and watery layer that forms the innermost layer of the pericardium
- 5. layer of cardiac muscle that makes up the middle of the heart
- 6. an instrument used to measure blood pressure
- 8. the lowest part of the exterior of the heart
- 9. tiny blood vessels that merge with the veins
- 12. the functional inter-relationship between the heart and the lungs
- 14. carry oxygenated blood from the heart to the organs and cells of the body
- 17. carry oxygen-poor blood to the heart
- 19. the largest artery of the human body