1. It secretes saliva.   16   2   13   3   Hint Half-n-half Clue   2. Exchange of gases occurs here.   9   7   3   11   Half-n-half Clue   3. It is a muscular tube containing semicircular rings of cartilages.   10   5   7   12   Half-n-half Clue   4. Churning of food occurs here.   12   2   14   8   Half-n-half Clue   5. It secretes pancreatic juice.   15   9   11   13   Half-n-half Clue   6. Most of the ingested water is absorbed here.   7   6   14   5   Half-n-half Clue   7. Bile is secreted here.   6   11   14   9   Half-n-half Clue