Chapter 4 Vocab

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