The gallbladder concentrates and stores bile as a pear-shaped sac which it can release to help digestion after a fatty meal.
1,3,7 trimethylxanthine: an alkaloid obtained from the dried leaves of Thea Sinensis, tea or the dried seeds of Coffea arabica, coffee; used as a central nervous system stimulant, diuretic, circulatory and respiratory stimulant, and as an adjunct in the treatment of headaches