Ch17 Puzzle #2

123456
Across
  1. 4. A hardened deposit of dental plaque
  2. 5. occurs In saliva; anti calculus component
  3. 6. solution ingredient can be held in Permanently
Down
  1. 1. White blood corpuscle;Functions to protect body
  2. 2. Nucleus, focus, point of orgin
  3. 3. A surrounding framework, enabling development