How does the body eliminate waste from the digestive system?

The elimination of waste from the digestive system primarily occurs through the rectum and anus. After the digestive process is complete, undigested food, fiber, and other waste products form feces in the large intestine. The rectum serves as a temporary storage site for this fecal matter until it is expelled from the body through the anus during the process of defecation. This mechanism effectively removes solid waste from the body, maintaining homeostasis and preventing the buildup of waste materials.

Other processes such as those listed in the other options do not primarily deal with the elimination of waste in the same way. For instance, while the bloodstream does transport waste products, it does not actively eliminate them but rather facilitates their transport to excretory organs, like the kidneys and liver, for processing. Bile produced in the liver plays a role in digestion and fat emulsification but is not a primary means of waste elimination; instead, bile components can be excreted in feces. Lastly, the consideration of gases primarily relates to digestion and may be expelled from the body, but that does not encompass the elimination of solid waste as conducted through the rectum and anus.