Across
- 6. A group of cells located in the right atrium that sends out signals that make the heart contract and that regualtes heartbeat rate
- 9. The body system that consists of the heart, blood vessels and blood, and that carries needed substances to the cells and carries waste products away from cells
- 12. A blood vessel that carries blood away from the heart
- 13. The force of something exerts over a given area
- 14. A blood vessel that carries blood back to the heart
Down
- 1. The largest artery in the body
- 2. A tiny blood vessel where substances are exchanged between the blood and the body cells
- 3. The process by which molecules move from an area in which they are highly concentrated to an area which is less concentrated
- 4. Each of the two lower chambers of the heart that pumps blood out of the heart
- 5. A push or a pull
- 7. The pressure that is exerted by the blood against the walls of blood vessels
- 8. A hollow, muscular organ that pumps blood througout the body
- 10. A flap of tissue in the heart or a vein that prevents blood from flowing backward
- 11. An instrument that measures blood pressure
- 12. Each of the two upper chambers of the heart that pumps blood out of the heart