Across
- 2. Protein in red blood cells that binds with oxygen
- 4. Phase in the cardiac cycle when the heart contracts
- 6. Red blood cells responsible for transporting oxygen
- 9. Blood vessels that carry blood towards the heart
- 10. The 2 upper chambers of the heart
- 11. Thin membrane lining the inside of the heart
- 12. Another word for the SA node that regulates heartbeat
Down
- 1. White blood cells that help protect the body from infection
- 3. Muscular organ that pumps blood throughout the body
- 5. Watery fluid in blood that transports nutrients and waste.
- 7. Platelets that play a role in blood clotting
- 8. Muscular wall dividing the left and right side of the heart