1. These are formed by division of trachea.   6   1   14   11   Hint Half-n-half Clue   2. Churning of food occurs here.   11   15   1   12   Half-n-half Clue   3. It secretes pancreatic juice.   12   13   6   16   Half-n-half Clue   4. It pumps blood to various parts of the body.   12   11   8   6   Half-n-half Clue   5. Food descends from mouth to stomach through this muscular tube.   12   2   11   9   Half-n-half Clue   6. Exchange of gases occurs here.   15   2   7   12   Half-n-half Clue   7. Undigested food is excreted out of the body through this opening.   11   16   13   6   Half-n-half Clue