Across
- 5. Breathing in, taking air into lungs
- 6. Breathing out, releasing air from lungs
- 7. Tiny air sacs in lungs where gas exchange happens
- 10. Openings in the nose for air intake
- 12. Tube that carries air from larynx to bronchi
Down
- 1. Muscle that separates chest and abdomen, aiding inhalation
- 2. Flap that covers trachea during swallowing
- 3. Membranes lining lungs and chest cavity
- 4. Air-filled cavities connected to nasal cavity
- 8. Spongy organs for gas exchange between air and blood
- 9. Main branches of trachea leading to lungs
- 11. Passageway shared by air and food