Stomach Stomach The stomach (from ancient Greek στόμαχος, "stomachos," "stoma" means mouth) is a muscular, hollow organ in the gastrointestinal tract of humans and many other animals, including several invertebrates. The stomach has a dilated structure and functions as a vital digestive organ. In the digestive system the stomach is involved in the second phase of digestion, following mastication (chewing). In humans and many other animals, the stomach is located between the oesophagus and the small intestine. It secretes digestive enzymes and gastric acid to aid in food digestion. The pyloric sphincter controls the passage of partially digested food (chyme) from
Built for the Kill the name of the episode. Built For The Kill uses a graphical approach to catch the audiences attention, often showing inner workings of the predatory animals (e.g. showing a snake's "Jacobson Organ" inside its mouth) by using diagrams. Some effects seen are used to show the audience what they can't really see, but is there (such as the electricity coming from an Electric Ray or the sound waves used in Echo Location). This graphical approach to nature is meant to make the documentary more interesting to watch. "Built for the Kill"s classic opening was a montage of creatures featured in