Anatomy of the Rectum and Anal Canal - Medical Illustration #3870580 (License: Personal Use)

This anatomical illustration depicts a sagittal cross-section of the lower gastrointestinal tract, focusing on the rectum and anal canal. Visible structures include the mucosal folds (anal columns), internal and external hemorrhoidal venous plexuses (shown as blue nodules), and surrounding musculature such as the internal and external anal sphincters. The image emphasizes normal anatomy for educational or diagnostic reference in gastroenterology and proctology.

Used in medical textbooks, patient education portals, and clinical websites to explain conditions like hemorrhoids, anal fissures, or rectal prolapse; supports user intent for understanding lower GI anatomy or preparing for colorectal procedures.