Chapter 18 - Skeletal System

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Across
  1. 1. the bones of the arms and legs, including the shoulder and hip bones where they are attached
  2. 5. an opening or hole, especially in a bone
  3. 9. the skull, spine, and rib cage bones, which surround an imaginary center line of the body
  4. 11. a joint in which bones slide over each other
  5. 13. small, flat, sesame seed-shaped bones embedded within tendons or joint capsules to withstand friction.
  6. 14. bones thin bones that are effective as a protective shell
  7. 16. bones that are a complex shape and contain mostly spongy bone with a covering of compact bone.
  8. 17. the soft spot on an infant’s head where the bones have not grown together yet
  9. 19. firm, whitish, flexible connective tissue found in various body parts, including where two bones meet to form a joint.
  10. 21. joints that only bend and straighten or open and close with no side-to-side movement
  11. 23. joints that consist of the rounded head of a bone that fits into the cup-shaped cavity of another bone.
  12. 25. a joint that allows movement around a single axis.
Down
  1. 2. the lighter, less dense inner layer of bone tissue that contains red bone marrow
  2. 3. that can bend, straighten, and move side to side.
  3. 4. the long shaft of bone between the two epiphyses
  4. 6. bones that are longer than they are wide and have a hollow diaphysis
  5. 7. bones that are as long as they are wide; are made of spongy bone covered by a layer of compact bone
  6. 8. a cell that breaks down bone during physical activity so it can be remodeled into new bone cells
  7. 10. term that describes the way cranial bones grow together to form a strong and immovable joint
  8. 12. the hard, dense, outer layer of bone tissue made to withstand stress
  9. 15. specialized bone-forming cells that begin the mineralization process
  10. 18. the process of taking calcium from any ingested food and drink and depositing it into cartilage to form bone.
  11. 20. the knob at the end of a long bone, which is made up of mostly spongy bone
  12. 22. a joint in which one bone forms a shape like a saddle and the other bone fits inside
  13. 24. a tough, fibrous tissue that connects bones to other bones and holds organs in place