Grade 8 Science, Unit 2

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Across
  1. 2. the body system that includes the blood, the heart, and the blood vessels
  2. 4. the largest organ of the lymphatic system which recycles old blood cells and makes new ones
  3. 5. a pale yellow fluid that is the main liquid in blood
  4. 7. a tiny blood vessel that carries blood to individual cells
  5. 17. fluid drained from body tissues, which contains protein, salt, sugar, and nitrogen wastes
  6. 20. the system that includes the skin of the human body
  7. 21. a narrow, dead-end tube connected to the large intestine
  8. 22. a blood vessel that carries blood to the heart
  9. 23. a group of body organs working together to perform a major function
  10. 25. a blood cell which carries oxygen and carbon dioxide
  11. 26. a body unit consisting of various kinds of tissues that work together
  12. 28. a strong band of cartilage that holds a joint firmly in place
  13. 30. a membrane that lines body passages and secretes mucus to remove and destroy disease germs
  14. 33. the system that includes the kidneys and associated organs
  15. 34. a whole body
  16. 37. a group of cells that specialize in the same function
  17. 38. a muscle that causes a joint to unbend
  18. 39. any item that stimulates the production of antibodies
  19. 43. the resistance to infection by a certain disease germ
  20. 44. a tough tissue that connects a muscle to a bone
  21. 45. a blood vessel that carries blood away from the heart
Down
  1. 1. the tiny sacs in the lungs where oxygen and carbon dioxide are exchanged
  2. 3. one of six lymphatic organs in the throat
  3. 6. a substance in the blood that fights a certain germ or group of related germs
  4. 8. one of the smallest organs of the lymphatic system, which produce a kind of white corpuscle and remove foreign materials
  5. 9. a place where two bones meet
  6. 10. the opening at the top of the voice box
  7. 11. a muscle that causes a joint to bend
  8. 12. a blood cell, which fights disease germs
  9. 13. the dome-shaped muscle that contracts to bring air into lungs
  10. 14. the outer layer of skin on the human body
  11. 15. a gland between the heart and the sternum which makes lymph cells that destroy viruses and cancer cells
  12. 16. the organ that pumps blood throughout the body
  13. 18. one of the two main organs of the respiratory system, consisting of a spongy mass of tubes and air sacs
  14. 19. one of the tiny purifying structures in the kidneys
  15. 24. the system that consists of the 206 bones of the human skeleton
  16. 27. either of two tubes that carry air from the windpipe to a lung
  17. 29. the body system that includes the lungs and other organs used in breathing
  18. 31. the system that includes the muscles of the human body
  19. 32. the flap that covers the glottis in swallowing
  20. 35. a tiny disc shaped body that is important in the clotting of blood
  21. 36. the inner layer of skin
  22. 40. the windpipe
  23. 41. one of the two main organs that filter urea and other wastes out of the blood
  24. 42. a network of vessels and nodes that follow the circulatory system and provide drainage and defense