Reviews what our body does with the food we consume and covers the major digestive organs and processes. The fundamental processes by which the body disposes of various types of wastes via the excretory system are also investigated. Common problems occurring in the digestive and excretory systems are discussed. Important terminology includes: nutrients, stomach, intestines, liver, pancreas, peristalsis, villi, indigestion, heartburn, diarrhea, ulcer, stomach and colon cancer, bladder, urethra, kidneys, nephrons, urine, urinary tract infection, and kidney stones. .