1. Most of the ingested water is absorbed here.   2   6   14   1   Hint Half-n-half Clue   2. Undigested food is excreted out of the body through this opening.   16   11   12   7   Half-n-half Clue   3. Absorption of food occurs here.   8   16   15   9   Half-n-half Clue   4. It is a muscular tube containing semicircular rings of cartilages.   13   3   5   6   Half-n-half Clue   5. Food is mixed with saliva here.   15   7   2   13   Half-n-half Clue   6. It secretes saliva.   3   15   16   11   Half-n-half Clue   7. These are formed by division of trachea.   9   6   11   3   Half-n-half Clue