1. 7   Exchange of gases occurs here.   It pumps blood to various parts of the body.   Food descends from mouth to stomach through this muscular tube.   It secretes pancreatic juice.   Hint Half-n-half Clue   2. 5   Larger dust particles in the inhaled air are trapped in the mucus and hair found here.   Absorption of food occurs here.   It is a muscular tube containing semicircular rings of cartilages.   These are formed by division of trachea.   Half-n-half Clue   3. 3   Bile is stored here.   Churning of food occurs here.   It secretes pancreatic juice.   It secretes saliva.   Half-n-half Clue   4. 8   Absorption of food occurs here.   It pumps blood to various parts of the body.   Most of the ingested water is absorbed here.   Larger dust particles in the inhaled air are trapped in the mucus and hair found here.   Half-n-half Clue   5. 15   Larger dust particles in the inhaled air are trapped in the mucus and hair found here.   Churning of food occurs here.   It pumps blood to various parts of the body.   Absorption of food occurs here.   Half-n-half Clue   6. 11   Bile is secreted here.   Exchange of gases occurs here.   Absorption of food occurs here.   Food is mixed with saliva here.   Half-n-half Clue   7. 13   It pumps blood to various parts of the body.   Bile is secreted here.   Larger dust particles in the inhaled air are trapped in the mucus and hair found here.   It secretes pancreatic juice.   Half-n-half Clue