Large Intestine

Description

Rendered on an adult female figure in anatomical position, the large intestine is visualized from the cecum in the right lower quadrant through the ascending colon to the hepatic flexure, then across the transverse colon to the splenic flexure and into the descending colon along the left flank. Inferiorly, the sigmoid colon curves medially into the pelvis to continue as the rectum in the midline, consistent with normal topography. The bowel course is shown in situ within the abdominopelvic cavity, with the colonic frame encircling the central abdominal contents and the rectum descending posterior to the pubic region. Orientation like this matters when you are teaching or planning around real-world pain patterns and access routes, because the named flexures and the pelvic turn of the sigmoid are common sites of diagnostic focus during colonoscopy and CT abdomen and pelvis. The sigmoid colon’s mobility and luminal angulation also explain why volvulus clusters here, while the fixed retroperitoneal position of the ascending and descending colon influences how perforation and retroperitoneal air can present. Clean surface-to-organ registration helps learners translate a patient’s abdominal exam into segmental colonic anatomy. Use this for gross anatomy and GI blocks when introducing colonic segments, peritoneal relationships, and the transition from sigmoid colon to rectum. It also fits patient-education handouts and publisher figures discussing colorectal cancer screening, diverticulitis distribution (often sigmoid), and procedural orientation for colonoscopy reporting. Anatomical accuracy verified by SciePro's Medical Advisory Board.