Fecal matter, commonly known as stool or feces, is the solid waste product expelled from the digestive tract of humans and animals. It consists of undigested food, bacteria, and cells shed from the lining of the intestines. The composition and appearance of fecal matter can vary based on diet, hydration, and overall health. The study of fecal matter is important in fields like medicine and environmental science. Analyzing feces can provide insights into a person's health, including the presence of diseases or infections. In agriculture, fecal matter can be used as fertilizer, enriching soil with nutrients.