Across
- 1. Inferior vena ______
- 3. A-V tricuspid _______
- 4. The node that is the natural Pacemaker
- 7. Two bottom chambers of the heart
- 8. Coronary _____
Down
- 1. The QRS ______
- 2. The valve between the upper and lower chambers
- 5. The deoxygenated blood first enters the Left ____
- 6. Purkinje __________