What is the lower portion of the gastrointestinal tract that is typically excluded from the abdominal cavity description?

The lower portion of the gastrointestinal tract that is typically excluded from the abdominal cavity description is the rectum. The rectum is situated in the pelvic cavity, which is anatomically separate from the abdominal cavity. While the other options such as the stomach, pancreas, and gallbladder are located in the abdominal cavity, the rectum is the terminal part of the large intestine and is generally classified as part of the lower gastrointestinal system extending into the pelvis. This distinction is important for various medical contexts, including coding, as it impacts how health care practitioners view anatomical relationships and potential conditions affecting these areas.