1. Larger dust particles in the inhaled air are trapped in the mucus and hair found here.   13   15   11   1   Hint Half-n-half Clue   2. Bile is secreted here.   6   13   11   15   Half-n-half Clue   3. It is a muscular tube containing semicircular rings of cartilages.   16   11   5   7   Half-n-half Clue   4. These are formed by division of trachea.   15   7   12   6   Half-n-half Clue   5. It secretes saliva.   8   3   6   14   Half-n-half Clue   6. Absorption of food occurs here.   15   5   6   11   Half-n-half Clue   7. It secretes pancreatic juice.   13   8   2   15   Half-n-half Clue