Across
- 7. ______________ is a double-walled sac.
- 8. The _________ node is the hearts' pacemaker
- 12. The Superior and Inferior ___________ enter the right atrium of the heart.
- 14. ______________ Circulation has oxygen-rich blood returned to the left side of the heart is pumped out into the aorta.
- 17. The _________ are the superior receiving chambers.
- 19. __________ arteries supply the heart with blood
- 21. __________ is rapid heart rate, over 100 beats per minute.
- 22. __________ Fibers spread the signal within the ventricle wall muscles
- 23. The inner most wall is the __________.
- 24. _____________ circulation is the circuit for blood flow from the heart to the lungs
- 26. The ____________ Pericardium is the outside layer, lining the inner surface of the fibrous pericardium.
Down
- 1. ____________ fluid fills the space between the layers of pericardium.
- 2. How many chambers of the area are there?
- 3. The heart is supplied with blood during _________.
- 4. _________________ valves are between the ventricle and the artery.
- 5. The heart is the ________ of a human fist.
- 6. _____ carry blood back to the Heart
- 9. The _________ are the inferior discharging centers.
- 10. The _______ of the heart points toward the right shoulder.
- 11. _______________ is slow heart rate, less than 60 beats per minute
- 13. _______________ valves are between atria and ventricles
- 15. ________ allow for exchange between blood and tissue
- 16. The outer most wall is the __________.
- 18. The _______ is the largest artery in the body.
- 20. Mediastinum The heart is located in the thoracic cavity between the lungs in the ______________ _____________.
- 25. The _______ of the heart is directed toward the left hip.