Respiratory system

1234567
Across
  1. 4. This organ produces hiccup
  2. 6. Asphixia occurs due to...
  3. 7. Tiny air sacs inside your lungs
Down
  1. 1. Other name for the trachea
  2. 2. Trachea divides into...
  3. 3. Oxigenated blood is carried to the heart by...
  4. 5. Little branches inside our lungs