Stomach the first three chambers of which are all lined with oesophageal mucosa. In birds and crocodilians, the stomach is divided into two regions. Anteriorly is a narrow tubular region, the proventriculus, lined by fundic glands, and connecting the true stomach to the crop. Beyond lies the powerful muscular gizzard, lined by pyloric glands, and, in some species, containing stones that the animal swallows to help grind up food. In insects there is also a crop. The insect stomach is called the midgut. Information about the stomach in echinoderms or molluscs can be found under the respective articles. Stomach The stomach
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