Surveys the digestive and urinary systems, covering the gastrointestinal tract, salivary glands, chyme, pyloric sphincter, small intestines, large intestines, appendix, colon, liver, gall bladder, pancreas, urinary system, kidneys, nephrons, Bowman's capsule, and ureters.ule, and ureters.ule, and ureters.ule, and ureters.