Biology

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Across
  1. 2. it is covered by a hard, white layer called the enamel
  2. 4. in which type of animal canines are very sharp and long
  3. 6. food changes into ball like mass called
  4. 7. which animals have heterodant teeth
  5. 8. in the mouth ,food is first chewed and broken into small pieces this is called.
Down
  1. 1. food pipe is called
  2. 3. nutrition in humans is (they ingest solid food)
  3. 5. it is the process of elimination of undigested matter in the form of faeces