1. Exchange of gases occurs here.   2   13   6   7   Hint Half-n-half Clue   2. Most of the ingested water is absorbed here.   14   5   2   6   Half-n-half Clue   3. These are formed by division of trachea.   5   6   12   15   Half-n-half Clue   4. Food is mixed with saliva here.   12   5   2   15   Half-n-half Clue   5. It secretes pancreatic juice.   5   8   6   13   Half-n-half Clue   6. It is a muscular tube containing semicircular rings of cartilages.   13   3   16   5   Half-n-half Clue   7. Absorption of food occurs here.   7   15   8   12   Half-n-half Clue