Skeletal System Try 2

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Across
  1. 3. This color bone marrow stores fat
  2. 6. Rubbery gristle cartilage that helps give the ribcage its flexibility
  3. 9. Found between the bones in the skull
  4. 10. On average, human _____ is made up of 62% of water, while bones only contain 20%
  5. 12. Allows for arm movement from side to side and backward and forward
  6. 15. About 25 million red blood cells race through your ______ at any given time
  7. 19. Animals with no back bone
  8. 20. This three-part bone gives protection to the center of the chest
  9. 21. The longest and strongest bone in the human body
  10. 24. Help you keep your balance by swinging at your sides when you walk
  11. 27. The skull provides a helmet around what organ?
  12. 28. At each end of most long bones is a bar of cartilage called the _____
  13. 30. The collection of bones that protect the stomach, liver, and other parts of the upper abdomen
Down
  1. 1. The oldest type of surgery known to medicine
  2. 2. Made up of 28 bones
  3. 4. Fight off infections from bacteria, viruses, and other bodily invaders
  4. 5. Made up of osteons, hard part of the bone
  5. 7. What makes up the hard part of the bone?
  6. 8. Nerve center of the body, protected by the vertebrae
  7. 11. When the skeleton first forms, it is mainly made up of what?
  8. 13. Animals with a backbone
  9. 14. The curves in the vertebral column are needed for ____
  10. 16. About two-thirds of a bone’s weight comes from _____
  11. 17. Contains nerves to signal pain
  12. 18. The jellylike inner part of the bone
  13. 22. A flexible system under the skin which gives us our shape
  14. 23. The smallest bones in the human body
  15. 25. The simplest of joints, allows for movement like that of a door
  16. 26. The type of ribs that do not reach around the front of the chest
  17. 29. The funny bone