Body systems

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Across
  1. 1. the network of nerve cells and fibers which transmits nerve impulses between parts of the body
  2. 3. Air-sacs in lungs where O2 and CO2 exchange take place
  3. 8. The process by which bones form
  4. 11. two superior chambers of the heart, serve as receiving chambers
  5. 14. The muscular system’s main function is to allow movement. When muscles contract, they contribute to gross and fine movement.
  6. 15. an organ system consisting of skeletal, smooth and cardiac muscles. It permits movement of the body, maintains posture and circulates blood throughout the body
  7. 16. A muscle movement under conscious control (e.g. deciding to move the forearm).
  8. 17. flap of cartilage that prevents food or liquid from entering trachea
  9. 18. connects the brain to the spinal cord
  10. 20. the cells that help develop a new bone
Down
  1. 2. your body's central framework. It consists of bones and connective tissue, including cartilage, tendons, and ligaments.
  2. 4. A muscle movement not under conscious control (e.g. the beating of the heart).
  3. 5. a biological system consisting of specific organs and structures used for gas exchange in animals and plants.
  4. 6. The large trunk artery that carries blood from the left ventricle of the heart to branch arteries
  5. 7. the major "highway" connecting the brain and the peripheral nervous system
  6. 9. End of trachea divided into right and left sides
  7. 10. an organ system that permits blood to circulate and transport nutrients
  8. 12. The end of bones
  9. 13. vessels that carry blood to heart from the venules
  10. 19. the small space between neurons across which an impulse must move