Across
- 2. Epithelium The nasal chamber is provided with a pocket of sensory cells.
- 5. Muscles These muscles run obliquely from one side of he rib to the next.
- 6. anhydrase The enzyme that helps convert carbon dioxide into bicarbonate ion.
- 8. The wind pipe is guarded by a muscular flap.
Down
- 1. The inflammation of the bronchi.
- 3. The structure in the Human respiratory system which is devoid of cartilage
- 4. oblongata The respiratory centre is located in.
- 7. fluis It provides lubrication for the free movement of the expanding and contracting lungs.