20. Which layer of tissue is damaged in a first-degree burn?        

15. A dendritic or Langerhans cell is a specialized ________.        

32. Prevention of osteoporosis includes adequate intake of ________.        

23. Bones are covered and lined by a protective tissue called the periosteum. The inner (osteogenic) layer consists primarily of ________.        

30. Fractures are repaired in four steps. Which of the  following explains those steps in the chronological order?        

3. The major regions of a hair shaft include all of the following EXCEPT ________.        

27. Which of the following is NOT a primary function of the skeletal system?        

19. In addition to protection (physical and chemical barrier), the skin serves other functions. Which of the following is another vital function of the skin?        

3. A fracture in the shaft of a bone would be a break in the ________.         .

8. Which of the following cells and their function are correctly matched?