1. Absorption of food occurs here.   15   10   16   2   Hint Half-n-half Clue   2. Undigested food is excreted out of the body through this opening.   16   6   2   15   Half-n-half Clue   3. Most of the ingested water is absorbed here.   14   15   6   1   Half-n-half Clue   4. It pumps blood to various parts of the body.   15   9   3   8   Half-n-half Clue   5. Larger dust particles in the inhaled air are trapped in the mucus and hair found here.   2   12   1   7   Half-n-half Clue   6. It is a muscular tube containing semicircular rings of cartilages.   6   1   12   5   Half-n-half Clue   7. These are formed by division of trachea.   13   12   9   6   Half-n-half Clue