A sectioned view of the colon

Description

Sectioned segments of the large intestine are rendered to emphasize the colonic lumen and mucosa, with semilunar folds (plicae semilunares coli) projecting into the cavity between the haustra. The ascending colon lies on the subject’s right, continuing superiorly to the transverse colon, then turning inferiorly as the left-sided descending colon and curving medially into the sigmoid colon before the rectum. Inferior and slightly medial to the ileocecal junction, the cecum gives rise to the vermiform appendix. Teniae coli run longitudinally along the external surface, gathering the wall into sacculations that correspond internally to the fold pattern. A sectioned view like this is where learners finally connect gross landmarks to the mucosal topography seen at colonoscopy. Those semilunar folds create recesses that can hide sessile serrated lesions, and the haustral segmentation helps explain why incomplete distension or suboptimal bowel preparation leaves blind spots. Surgeons also care: teniae coli converge at the appendiceal base, a reliable intraoperative guide when tracing the cecum during appendectomy or right hemicolectomy. Use this artwork in gastrointestinal anatomy and histology blocks to bridge macroscopic organization (cecum through rectum) with endoluminal appearance, or in endoscopy teaching files and patient-facing materials explaining why polyps may be missed behind folds. It also suits operative manuals and clinical review articles discussing diverticulosis distribution, appendicitis localization, and colonic transit patterns tied to haustra. Anatomical accuracy verified by SciePro's Medical Advisory Board.