Body Systems Review

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Across
  1. 3. Thick-walled blood vessels that take blood away from the heart to the rest of the body.
  2. 5. Poisonous substance converted from highly toxic ammonia by the liver.
  3. 6. Two main branches of the trachea that lead that lead to the lungs.
  4. 7. Physical breakdown of food into small pieces.
  5. 9. Tissue of the brain, spinal cord, and nerves.
  6. 11. Long extension of a neuron's cell body that transmits information to neighbouring cells.
  7. 12. Tiny air-filled sacs in the lungs; the site of gas exchange.
  8. 13. Tiny blood vessels that connect arteries to veins; one cell layer thick and extremely narrow.
  9. 15. Removal of waste products from the blood using a machine that functions as a kidney.
  10. 17. Large muscle below the lungs that helps move air in and out of the lungs.
  11. 18. Division of the nervous system composed of the cranial and spinal nerves.
  12. 24. Small branches of a neuron that receive information from neighbouring cells.
  13. 26. Division of the nervous system composed of the brain and spinal cord.
  14. 29. Specialized cells of the nervous system that receive and transmit information.
  15. 30. Tubes that connect the bronchi to the air sacs in the lungs.
  16. 31. Automatic response to a stimulus; happens very quickly and without conscious control.
  17. 33. Wave-like muscle contractions along the digestive system.
Down
  1. 1. Waste removal.
  2. 2. Division of the peripheral nervous system that controls voluntary responses.
  3. 4. Large artery carrying blood from the left ventricle to the body.
  4. 8. Liquid in stomach made of mucus, hydrochloric acid, enzymes, and water; chemically digests food.
  5. 10. Carry information from the central nervous system to the muscles or other organs.
  6. 14. Blood cells specialized to fight infection.
  7. 16. Breakdown of large food particles into smaller particles by enzymes.
  8. 19. Division of the peripheral nervous system that controls automatic responses in the body, such as heart rate.
  9. 20. Substance created by the body to carry out chemical digestion.
  10. 21. Blood vessels that return blood from the body to the heart; have valves.
  11. 22. Cells that carry information from the body to the central nervous system.
  12. 23. Cell fragments in the blood that help stop bleeding at cuts.
  13. 25. Small finger-like projections on the inner surface of the small intestine that absorb nutrients.
  14. 27. Lower chambers of the heart that pump blood to the body.
  15. 28. Upper chambers of the heart that receive blood away from the heart.
  16. 32. Filtering units of the kidney that remove wastes from the blood and produce urine.