Dr.von Israel's body quizz

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Across
  1. 1. the system with muscles in it
  2. 5. the system with the male/female genitals
  3. 6. the system which protects for infections
  4. 7. the other defence system which filters organisms
Down
  1. 2. the system with the heart in it
  2. 3. the system which produces hormones
  3. 4. the system with the stomach in it
  4. 5. the system with the lungs in it