A section through the rectum and the anal canal: nineteen structures from the sigmoid colon, the peritoneum and the three transverse folds through the ampulla, the prostate, the levator ani and both sphincters, to the cavernous body, the venous plexus, the dentate line, the anal crypts, the pecten…
A real anatomical diagram. Hover any part to see its name, click to answer the quiz question.