Skeletal System Crossword Puzzle

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Across
  1. 5. The sea star has an opening on the aboral surface that allows it to bring water into its body
  2. 6. True or False? Bones are continually being renewed and rebuilt throughout a human's lifespan
  3. 7. The bony plates of a sea star located under the skin and made of calcium
  4. 10. A type of bone with dense circles of bone with hollow cylinders that carry nerves and blood vessels
  5. 12. The type of skeleton that humans have
  6. 13. Specialized cell that builds new bone
  7. 14. Bone with honeycombed open spaces
  8. 15. Skeleton type that includes the arm and leg bones
  9. 16. Adults have more of this type of bone marrow
  10. 17. The scientific term for kneecap
  11. 18. The mineral matrix of bone is made up of calcium and phosphorus, called...
  12. 21. Collar-bone, part of appendicular skeleton
  13. 23. The sea star has hundreds of ________that aid in locomotion on the oral surface
Down
  1. 1. A disease due to Vitamin D deficiency in children that leads to weaker bones
  2. 2. A disease where bone is broken done faster than it is rebuilt, leads to lower bone mineral density
  3. 3. A smooth connective tissue that lacks blood vessels and coats the ends of bones
  4. 4. A key mineral for bone growth
  5. 8. The end of a long bone where the growth plate is located
  6. 9. Lower arm bone on the thumb-side
  7. 11. The hollow center of a long bone where bone marrow is found
  8. 19. Specialized cell that breaks down old bone
  9. 20. The type of skeleton that includes the skull, vertebral column, sternum, and ribs
  10. 22. When someone breaks their hip, they break this bone