Across
- 3. Heart rate substantially slower than normal
- 7. Second group of WBCs
- 13. Nonliving fluid matrix
- 14. Resides in red bone marrow
- 16. A decrease in the oxygen-carrying ability of the blood
- 17. Visceral layer
- 18. Mitral valve
- 19. Prevent backflow of blood
Down
- 1. Has three flaps
- 2. Granule containing WBCs
- 4. The heart is enclosed by a double walled sac called
- 5. Thin glistening sheet of endothelium that lines he heart chambers
- 6. Blood cell formation
- 7. Acts as a carrier to shuttle certain molecules through circulation
- 8. White blood cells
- 9. Contraction and relaxation
- 10. Rapid heart rate
- 11. WBCs by contrast are able to slip into and out of the blood vessels
- 12. Red blood cells
- 15. The SA node is often called the