Ch 20-21

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Across
  1. 6. type of muscle found only in the heart
  2. 7. place where sebaceous glands are found
  3. 8. body's first line of defense
  4. 11. type of tissue that supports, connects and protects other structures in the body
  5. 13. another name for immovable joints
  6. 14. process of bones becoming harder and more rigid; happens when infants bones fuse
  7. 17. system that controls and regulates body functions using hormones
  8. 18. another name for the fingertip bone
Down
  1. 1. longest bone in the body
  2. 2. protects your brain
  3. 3. type of cells that destroy bone so new bone can be made
  4. 4. method of building immunity that involves exposing someone to a small amount of a pathogen to build an immune response
  5. 5. skin uses sunlight to produce this
  6. 9. place where lymphocytes are produced
  7. 10. place where melanin is produced
  8. 12. type of tissue that makes up the epidermis
  9. 15. type of disease in which a person's immune system can't distinguish the body's own cells from invaders
  10. 16. place where bones meet