1. These are formed by division of trachea.   5   3   2   6   Hint Half-n-half Clue   2. Absorption of food occurs here.   15   10   7   5   Half-n-half Clue   3. Most of the ingested water is absorbed here.   14   15   13   7   Half-n-half Clue   4. Food is mixed with saliva here.   7   3   2   8   Half-n-half Clue   5. Undigested food is excreted out of the body through this opening.   5   16   9   6   Half-n-half Clue   6. It secretes saliva.   3   7   1   15   Half-n-half Clue   7. It is a muscular tube containing semicircular rings of cartilages.   16   8   5   10   Half-n-half Clue