Respiratory System

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Across
  1. 3. What enters the lungs when the animal inhales.
  2. 4. Takes place in the alveoli across a semi permeable membrane.
  3. 5. Divides the nasal passages into two.
  4. 6. Follows the trachea and eventually splits into two.
Down
  1. 1. Where the air first enters the body when the animal inhales.
  2. 2. The name of the system.