Life Science Chapter 13 Review

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Across
  1. 3. bone that has many empty spaces
  2. 4. muscles you can control
  3. 5. the study of how organs and structures function
  4. 6. the outer layer of the skin
  5. 7. the study of the organs and structures of the body
  6. 8. the body produces this when exposed to sunlight
  7. 10. the thickest layer of skin which contains blood vessels, nerves, and follicles
  8. 12. the brown pigment that determines human skin color
  9. 14. a band of connective tissue that attaches muscle to bone
  10. 15. this body system includes the skin
  11. 16. muscles you cannot control at will
Down
  1. 1. a type of connective tissue that is softer and more flexible than bone
  2. 2. when muscles contract, they give off heat which helps our bodies maintain...?
  3. 4. muscles are named after their size, what bone they're attached to, and their...?
  4. 5. the tough white tissue that covers bone and forms new bone tissue
  5. 9. a tough, flexible band of connective tissue that holds joints together
  6. 11. this layer of skin consists of fat cells that help cushion the body
  7. 13. two or more bones meet together