1. Exchange of gases occurs here.   1   16   7   12   Hint Half-n-half Clue   2. Undigested food is excreted out of the body through this opening.   12   16   6   1   Half-n-half Clue   3. Churning of food occurs here.   10   8   6   12   Half-n-half Clue   4. Most of the ingested water is absorbed here.   7   14   13   5   Half-n-half Clue   5. Larger dust particles in the inhaled air are trapped in the mucus and hair found here.   1   6   2   11   Half-n-half Clue   6. Food is mixed with saliva here.   13   9   2   6   Half-n-half Clue   7. Bile is secreted here.   14   9   6   11   Half-n-half Clue