What organ does fecal matter come from?

Fecal matter does not come from any specific organ. It is the end product of the digestive system, which consists of the mouth, esophagus, stomach, small intestine, and large intestine. After food is consumed, it is broken down and absorbed by the body through these organs. The waste products, including fecal matter, are then passed out of the body through the rectum and anus.