1. 13   It secretes pancreatic juice.   Absorption of food occurs here.   Most of the ingested water is absorbed here.   Food descends from mouth to stomach through this muscular tube.   Hint Half-n-half Clue   2. 8   It is a muscular tube containing semicircular rings of cartilages.   Undigested food is excreted out of the body through this opening.   Larger dust particles in the inhaled air are trapped in the mucus and hair found here.   It pumps blood to various parts of the body.   Half-n-half Clue   3. 7   Exchange of gases occurs here.   These are formed by division of trachea.   It secretes saliva.   Absorption of food occurs here.   Half-n-half Clue   4. 9   Food is mixed with saliva here.   Bile is stored here.   Food descends from mouth to stomach through this muscular tube.   Churning of food occurs here.   Half-n-half Clue   5. 16   Absorption of food occurs here.   Undigested food is excreted out of the body through this opening.   These are formed by division of trachea.   It pumps blood to various parts of the body.   Half-n-half Clue   6. 12   Exchange of gases occurs here.   Churning of food occurs here.   Undigested food is excreted out of the body through this opening.   It is a muscular tube containing semicircular rings of cartilages.   Half-n-half Clue   7. 2   Churning of food occurs here.   Food is mixed with saliva here.   Bile is secreted here.   Most of the ingested water is absorbed here.   Half-n-half Clue